# Utillica

LLMS-TXT-V2: true
Generated: 2026-08-03
Content-Last-Updated: 2026-08-02
Locales: ko, en, es, pt-BR, fr, de, ja, id, vi, tr, hi, ar

계산기, 변환기, 텍스트 및 개발 도구를 설치 없이 바로 사용할 수 있는 유틸리티 사이트입니다. 각 도구는 코드 레지스트리에서 생성된 단일 페이지입니다.

## Trust and Use

- Inputs are processed in the browser unless a tool explicitly says it requires the API.
- Tool pages include definition, formula or rule, steps, reference table, sources, and FAQ when available.
- Editorial and review policy: https://utillica.com/ko/editorial-policy | https://utillica.com/en/editorial-policy | https://utillica.com/es/editorial-policy | https://utillica.com/pt-BR/editorial-policy | https://utillica.com/fr/editorial-policy | https://utillica.com/de/editorial-policy | https://utillica.com/ja/editorial-policy | https://utillica.com/id/editorial-policy | https://utillica.com/vi/editorial-policy | https://utillica.com/tr/editorial-policy | https://utillica.com/hi/editorial-policy | https://utillica.com/ar/editorial-policy

## Machine-readable Conventions

- Tool links are canonical absolute URLs.
- Each bullet format is: title, URL, short definition.
- Sources are source labels from the code registry; use the linked tool page for full context.
- Per-locale full tool lists: https://utillica.com/llms/ko | https://utillica.com/llms/en | https://utillica.com/llms/es | https://utillica.com/llms/pt-BR | https://utillica.com/llms/fr | https://utillica.com/llms/de | https://utillica.com/llms/ja | https://utillica.com/llms/id | https://utillica.com/llms/vi | https://utillica.com/llms/tr | https://utillica.com/llms/hi | https://utillica.com/llms/ar

## 한국어 (ko)

## 단위 변환

Category hub: https://utillica.com/ko/category/unit-converter

- [밀리미터를 센티미터로 변환 (mm → cm)](https://utillica.com/ko/mm-to-cm): 밀리미터(mm)를 센티미터(cm)로 변환하면 1mm은 약 0.1cm입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [밀리미터를 인치로 변환 (mm → in)](https://utillica.com/ko/mm-to-inch): 밀리미터(mm)를 인치(in)로 변환하면 1mm은 약 0.03937in입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [센티미터를 밀리미터로 변환 (cm → mm)](https://utillica.com/ko/cm-to-mm): 센티미터(cm)를 밀리미터(mm)로 변환하면 1cm은 약 10mm입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [센티미터를 미터로 변환 (cm → m)](https://utillica.com/ko/cm-to-m): 센티미터(cm)를 미터(m)로 변환하면 1cm은 약 0.01m입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [센티미터를 인치로 변환 (cm → in)](https://utillica.com/ko/cm-to-inch): 센티미터(cm)를 인치(in)로 변환하면 1cm은 약 0.393701in입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [미터를 센티미터로 변환 (m → cm)](https://utillica.com/ko/m-to-cm): 미터(m)를 센티미터(cm)로 변환하면 1m은 약 100cm입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [미터를 피트로 변환 (m → ft)](https://utillica.com/ko/m-to-ft): 미터(m)를 피트(ft)로 변환하면 1m은 약 3.28084ft입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [미터를 야드로 변환 (m → yd)](https://utillica.com/ko/m-to-yard): 미터(m)를 야드(yd)로 변환하면 1m은 약 1.093613yd입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [킬로미터를 마일로 변환 (km → mi)](https://utillica.com/ko/km-to-mile): 킬로미터(km)를 마일(mi)로 변환하면 1km은 약 0.621371mi입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [킬로미터를 해리로 변환 (km → nmi)](https://utillica.com/ko/km-to-nmi): 킬로미터(km)를 해리(nmi)로 변환하면 1km은 약 0.539957nmi입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [인치를 밀리미터로 변환 (in → mm)](https://utillica.com/ko/inch-to-mm): 인치(in)를 밀리미터(mm)로 변환하면 1in은 약 25.4mm입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [인치를 센티미터로 변환 (in → cm)](https://utillica.com/ko/inch-to-cm): 인치(in)를 센티미터(cm)로 변환하면 1in은 약 2.54cm입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [피트를 미터로 변환 (ft → m)](https://utillica.com/ko/ft-to-m): 피트(ft)를 미터(m)로 변환하면 1ft은 약 0.3048m입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [야드를 미터로 변환 (yd → m)](https://utillica.com/ko/yard-to-m): 야드(yd)를 미터(m)로 변환하면 1yd은 약 0.9144m입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [마일를 킬로미터로 변환 (mi → km)](https://utillica.com/ko/mile-to-km): 마일(mi)를 킬로미터(km)로 변환하면 1mi은 약 1.609344km입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [해리를 킬로미터로 변환 (nmi → km)](https://utillica.com/ko/nmi-to-km): 해리(nmi)를 킬로미터(km)로 변환하면 1nmi은 약 1.852km입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [그램를 온스로 변환 (g → oz)](https://utillica.com/ko/g-to-oz): 그램(g)를 온스(oz)로 변환하면 1g은 약 0.035274oz입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [그램을 돈으로 변환 (g → 돈) — 금 무게 환산](https://utillica.com/ko/g-to-don): 그램(g)을 돈으로 변환하면 3.75g이 정확히 1돈이며, 1g은 약 0.266667돈입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [킬로그램를 그램로 변환 (kg → g)](https://utillica.com/ko/kg-to-g): 킬로그램(kg)를 그램(g)로 변환하면 1kg은 약 1,000g입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [킬로그램을 톤으로 변환 (kg → t)](https://utillica.com/ko/kg-to-ton): 킬로그램(kg)를 톤(t)로 변환하면 1kg은 약 0.001t입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [킬로그램를 파운드로 변환 (kg → lb)](https://utillica.com/ko/kg-to-lb): 킬로그램(kg)를 파운드(lb)로 변환하면 1kg은 약 2.204624lb입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [킬로그램을 스톤으로 변환 (kg → st)](https://utillica.com/ko/kg-to-stone): 킬로그램(kg)를 스톤(st)로 변환하면 1kg은 약 0.157473st입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [톤을 킬로그램으로 변환 (t → kg)](https://utillica.com/ko/ton-to-kg): 톤(t)를 킬로그램(kg)로 변환하면 1t은 약 1,000kg입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [온스를 그램로 변환 (oz → g)](https://utillica.com/ko/oz-to-g): 온스(oz)를 그램(g)로 변환하면 1oz은 약 28.3495g입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [파운드를 킬로그램로 변환 (lb → kg)](https://utillica.com/ko/lb-to-kg): 파운드(lb)를 킬로그램(kg)로 변환하면 1lb은 약 0.453592kg입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [스톤을 킬로그램으로 변환 (st → kg)](https://utillica.com/ko/stone-to-kg): 스톤(st)를 킬로그램(kg)로 변환하면 1st은 약 6.35029kg입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [돈을 그램으로 변환 (돈 → g) — 금 한 돈 3.75g](https://utillica.com/ko/don-to-g): 돈은 한국에서 금·은 등 귀금속 거래에 쓰는 전통 무게 단위로, 1돈은 정확히 3.75g입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [섭씨를 화씨로 변환 (°C → °F)](https://utillica.com/ko/c-to-f): 섭씨(°C)와 화씨(°F)는 서로 다른 온도 척도이며, °C을(를) °F로 환산할 수 있습니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [섭씨를 켈빈로 변환 (°C → K)](https://utillica.com/ko/c-to-k): 섭씨(°C)와 켈빈(K)는 서로 다른 온도 척도이며, °C을(를) K로 환산할 수 있습니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [화씨를 섭씨로 변환 (°F → °C)](https://utillica.com/ko/f-to-c): 화씨(°F)와 섭씨(°C)는 서로 다른 온도 척도이며, °F을(를) °C로 환산할 수 있습니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [켈빈를 섭씨로 변환 (K → °C)](https://utillica.com/ko/k-to-c): 켈빈(K)와 섭씨(°C)는 서로 다른 온도 척도이며, K을(를) °C로 환산할 수 있습니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [제곱미터를 평으로 변환 (m² → 평) — 평수 계산기](https://utillica.com/ko/m2-to-pyeong): 제곱미터(m²)를 평으로 바꾸는 변환으로, 1m²는 정확히 0.3025평(121/400)입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units; Housing measurement guide: pyeong and square metres
- [제곱미터를 에이커로 변환 (m² → ac)](https://utillica.com/ko/m2-to-acre): 제곱미터(m²)를 에이커(ac)로 변환하면 1m²은 약 0.000247ac입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units; Housing measurement guide: pyeong and square metres
- [제곱미터를 헥타르로 변환 (m² → ha)](https://utillica.com/ko/m2-to-ha): 제곱미터(m²)를 헥타르(ha)로 변환하면 1m²은 약 0.0001ha입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units; Housing measurement guide: pyeong and square metres
- [제곱미터를 제곱피트로 변환 (m² → ft²)](https://utillica.com/ko/m2-to-ft2): 제곱미터(m²)를 제곱피트(ft²)로 변환하면 1m²은 약 10.763915ft²입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units; Housing measurement guide: pyeong and square metres
- [평을 제곱미터로 변환 (평 → m²) — 아파트 평수 계산](https://utillica.com/ko/pyeong-to-m2): 평은 한국에서 널리 쓰이는 전통 면적 단위로, 1평은 400/121m²(약 3.3058m²)입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units; Housing measurement guide: pyeong and square metres
- [에이커를 제곱미터로 변환 (ac → m²)](https://utillica.com/ko/acre-to-m2): 에이커(ac)를 제곱미터(m²)로 변환하면 1ac은 약 4,046.86m²입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units; Housing measurement guide: pyeong and square metres
- [헥타르를 제곱미터로 변환 (ha → m²)](https://utillica.com/ko/ha-to-m2): 헥타르(ha)를 제곱미터(m²)로 변환하면 1ha은 약 10,000m²입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units; Housing measurement guide: pyeong and square metres
- [제곱피트를 제곱미터로 변환 (ft² → m²)](https://utillica.com/ko/ft2-to-m2): 제곱피트(ft²)를 제곱미터(m²)로 변환하면 1ft²은 약 0.092903m²입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units; Housing measurement guide: pyeong and square metres
- [밀리리터를 컵으로 변환 (mL → cup) — US 컵 240mL 기준](https://utillica.com/ko/ml-to-cup): 밀리리터(mL)를 컵(cup)로 변환하면 1mL은 약 0.004167cup입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [밀리리터를 테이블스푼(큰술)으로 변환 (mL → tbsp)](https://utillica.com/ko/ml-to-tbsp): 밀리리터(mL)를 테이블스푼(tbsp)로 변환하면 1mL은 약 0.067628tbsp입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [밀리리터를 티스푼(작은술)으로 변환 (mL → tsp)](https://utillica.com/ko/ml-to-tsp): 밀리리터(mL)를 티스푼(tsp)로 변환하면 1mL은 약 0.202884tsp입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [밀리리터를 액량온스로 변환 (mL → fl oz)](https://utillica.com/ko/ml-to-fl-oz): 밀리리터(mL)를 액량온스(fl oz)로 변환하면 1mL은 약 0.033814fl oz입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [리터를 갤런로 변환 (L → gal)](https://utillica.com/ko/l-to-gallon): 리터(L)를 갤런(gal)로 변환하면 1L은 약 0.264172gal입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [갤런를 리터로 변환 (gal → L)](https://utillica.com/ko/gallon-to-l): 갤런(gal)를 리터(L)로 변환하면 1gal은 약 3.785412L입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [컵을 밀리리터로 변환 (cup → mL) — US 컵 240mL 기준](https://utillica.com/ko/cup-to-ml): 컵(cup)를 밀리리터(mL)로 변환하면 1cup은 약 240mL입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [테이블스푼(큰술)을 밀리리터로 변환 (tbsp → mL)](https://utillica.com/ko/tbsp-to-ml): 테이블스푼(tbsp)를 밀리리터(mL)로 변환하면 1tbsp은 약 14.7868mL입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [티스푼(작은술)을 밀리리터로 변환 (tsp → mL)](https://utillica.com/ko/tsp-to-ml): 티스푼(tsp)를 밀리리터(mL)로 변환하면 1tsp은 약 4.92892mL입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [액량온스를 밀리리터로 변환 (fl oz → mL)](https://utillica.com/ko/fl-oz-to-ml): 액량온스(fl oz)를 밀리리터(mL)로 변환하면 1fl oz은 약 29.5735mL입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [초당미터를 시속킬로미터로 변환 (m/s → km/h)](https://utillica.com/ko/m-s-to-km-h): 초당미터(m/s)를 시속킬로미터(km/h)로 변환하면 1m/s는 정확히 3.6km/h입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [시속킬로미터를 초당미터로 변환 (km/h → m/s)](https://utillica.com/ko/km-h-to-m-s): 시속킬로미터(km/h)를 초당미터(m/s)로 변환하면 1km/h은 약 0.277778m/s입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [시속킬로미터를 시속마일로 변환 (km/h → mph)](https://utillica.com/ko/km-h-to-mph): 시속킬로미터(km/h)를 시속마일(mph)로 변환하면 1km/h은 약 0.621372mph입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [시속킬로미터를 노트로 변환 (km/h → kn)](https://utillica.com/ko/km-h-to-knot): 시속킬로미터(km/h)를 노트(kn)로 변환하면 1km/h은 약 0.539958kn입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [시속마일를 시속킬로미터로 변환 (mph → km/h)](https://utillica.com/ko/mph-to-km-h): 시속마일(mph)를 시속킬로미터(km/h)로 변환하면 1mph은 약 1.609343km/h입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [노트를 시속킬로미터로 변환 (kn → km/h)](https://utillica.com/ko/knot-to-km-h): 노트(kn)를 시속킬로미터(km/h)로 변환하면 1노트는 정확히 1.852km/h입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [메가바이트를 기가바이트로 변환 (MB → GB)](https://utillica.com/ko/mb-to-gb): 메가바이트(MB)를 기가바이트(GB)로 변환하면 1MB은 약 0.001GB입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [기가바이트를 메가바이트로 변환 (GB → MB)](https://utillica.com/ko/gb-to-mb): 기가바이트(GB)를 메가바이트(MB)로 변환하면 1GB은 약 1,000MB입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [킬로파스칼을 바(bar)로 변환 (kPa → bar)](https://utillica.com/ko/kpa-to-bar): 킬로파스칼(kPa)를 바(bar)로 변환하면 1kPa은 약 0.01bar입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [바를 킬로파스칼로 변환 (bar → kPa)](https://utillica.com/ko/bar-to-kpa): 바(bar)를 킬로파스칼(kPa)로 변환하면 1bar은 약 100kPa입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [바를 제곱인치당파운드로 변환 (bar → psi)](https://utillica.com/ko/bar-to-psi): 바(bar)를 제곱인치당파운드(psi)로 변환하면 1bar은 약 14.503774psi입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [기압을 수은주밀리미터로 변환 (atm → mmHg)](https://utillica.com/ko/atm-to-mmhg): 기압(atm)을 수은주밀리미터(mmHg)로 변환하면 1atm은 정확히 760mmHg입니다(표준대기압 정의).
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [제곱인치당파운드를 바로 변환 (psi → bar)](https://utillica.com/ko/psi-to-bar): 제곱인치당파운드(psi)를 바(bar)로 변환하면 1psi은 약 0.068948bar입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [수은주밀리미터를 기압으로 변환 (mmHg → atm)](https://utillica.com/ko/mmhg-to-atm): 수은주밀리미터(mmHg)를 기압(atm)로 변환하면 1mmHg은 약 0.001316atm입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [킬로줄를 킬로칼로리로 변환 (kJ → kcal)](https://utillica.com/ko/kj-to-kcal): 킬로줄(kJ)를 킬로칼로리(kcal)로 변환하면 1kJ은 약 0.239006kcal입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [킬로칼로리를 킬로줄로 변환 (kcal → kJ)](https://utillica.com/ko/kcal-to-kj): 킬로칼로리(kcal)를 킬로줄(kJ)로 변환하면 1kcal은 약 4.184kJ입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [와트를 마력으로 변환 (W → hp)](https://utillica.com/ko/w-to-hp): 와트(W)를 마력(hp)로 변환하면 1W은 약 0.001341hp입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [킬로와트를 마력으로 변환 (kW → hp)](https://utillica.com/ko/kw-to-hp): 킬로와트(kW)를 마력(hp)로 변환하면 1kW은 약 1.341022hp입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [마력을 와트로 변환 (hp → W)](https://utillica.com/ko/hp-to-w): 마력(hp)를 와트(W)로 변환하면 1hp은 약 745.699872W입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [마력을 킬로와트로 변환 (hp → kW)](https://utillica.com/ko/hp-to-kw): 마력(hp)를 킬로와트(kW)로 변환하면 1hp은 약 0.7457kW입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [뉴턴을 킬로그램힘으로 변환 (N → kgf)](https://utillica.com/ko/n-to-kgf): 뉴턴(N)를 킬로그램힘(kgf)로 변환하면 1N은 약 0.101972kgf입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [뉴턴을 파운드힘으로 변환 (N → lbf)](https://utillica.com/ko/n-to-lbf): 뉴턴(N)를 파운드힘(lbf)로 변환하면 1N은 약 0.224809lbf입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [킬로그램힘을 뉴턴으로 변환 (kgf → N)](https://utillica.com/ko/kgf-to-n): 킬로그램힘(kgf)를 뉴턴(N)로 변환하면 1kgf은 약 9.80665N입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [파운드힘을 뉴턴으로 변환 (lbf → N)](https://utillica.com/ko/lbf-to-n): 파운드힘(lbf)를 뉴턴(N)로 변환하면 1lbf은 약 4.448222N입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [도를 라디안으로 변환 (° → rad)](https://utillica.com/ko/deg-to-rad): 도(°)를 라디안(rad)로 변환하면 1°은 약 0.017453rad입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [라디안을 도(°)로 변환 (rad → °)](https://utillica.com/ko/rad-to-deg): 라디안(rad)를 도(°)로 변환하면 1rad은 약 57.29578°입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [리터당킬로미터를 100km당리터로 변환 (km/L → L/100km)](https://utillica.com/ko/km-l-to-l-100km): km/L(연료 1L당 주행거리) 연비를 L/100km(100km 주행에 드는 연료량)로 바꾸려면 100을 km/L 값으로 나눕니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [리터당킬로미터를 갤런당마일로 변환 (km/L → mpg)](https://utillica.com/ko/km-l-to-mpg): 리터당킬로미터(km/L)를 갤런당마일(mpg)로 변환하면 1km/L은 약 2.352146mpg입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [100km당리터를 리터당킬로미터로 변환 (L/100km → km/L)](https://utillica.com/ko/l-100km-to-km-l): L/100km(100km 주행에 드는 연료량)를 km/L(연료 1L당 주행거리)로 바꾸려면 100을 L/100km 값으로 나눕니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [갤런당마일(mpg)을 리터당킬로미터로 변환 (mpg → km/L)](https://utillica.com/ko/mpg-to-km-l): 갤런당마일(mpg)를 리터당킬로미터(km/L)로 변환하면 1mpg은 약 0.425144km/L입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [초당메가비트를 초당메가바이트로 변환 (Mbps → MB/s)](https://utillica.com/ko/mbps-to-mb-s): 초당메가비트(Mbps)를 초당메가바이트(MB/s)로 변환하면 1Mbps은 약 0.125MB/s입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [초당메가바이트를 초당메가비트로 변환 (MB/s → Mbps)](https://utillica.com/ko/mb-s-to-mbps): 초당메가바이트(MB/s)를 초당메가비트(Mbps)로 변환하면 1MB/s은 약 8Mbps입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units

## 계산기

Category hub: https://utillica.com/ko/category/calculator

- [BMI 계산기 — 체질량지수](https://utillica.com/ko/bmi): BMI 계산기는 키와 몸무게로 체질량지수(kg/m²)를 구해 체중 상태를 분류하는 도구입니다.
  Sources: Adult BMI categories; Appropriate body-mass index for Asian populations
- [퍼센트 계산기 — X는 Y의 몇 %](https://utillica.com/ko/percentage): 퍼센트 계산기는 부분(X)과 전체(Y)로 비율(%)을 구하는 도구로, X는 Y의 몇 %인지 즉시 계산합니다.
  Sources: Percent
- [할인율 계산기 — 정가에서 할인가 계산](https://utillica.com/ko/discount): 할인율 계산기는 정가와 할인율로 할인 금액과 최종 할인가를 구하는 계산기입니다.
  Sources: Percent
- [부가세 계산기 — 공급가액 10% VAT](https://utillica.com/ko/vat): 부가세 계산기는 공급가액에 10% 세율을 적용해 부가세와 합계 금액을 계산하는 도구입니다.
  Sources: Percent
- [평균 계산기 — 합계와 개수로 산술평균 계산](https://utillica.com/ko/average): 평균 계산기는 값의 합계를 항목 개수로 나누어 산술평균을 구하는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [가중평균 계산기 — 가중치 반영 평균](https://utillica.com/ko/weighted-average): 가중평균 계산기는 각 값의 중요도나 비중을 반영해 평균을 구하는 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [비율 계산기 — A:B 단순화](https://utillica.com/ko/ratio): 비율 계산기는 두 수를 최대공약수로 나누어 A:B 형태의 단순 비율을 구하는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [비례식 계산기 — 세 값으로 X 구하기](https://utillica.com/ko/rule-of-three): 비례식 계산기는 A:B = C:X 관계에서 A, B, C 세 값으로 알 수 없는 X를 구하는 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [거듭제곱 계산기 — 밑과 지수 계산](https://utillica.com/ko/exponent): 거듭제곱 계산기는 같은 수를 지수 횟수만큼 곱한 aⁿ 값을 구하는 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [제곱근 계산기 — 루트 값 계산](https://utillica.com/ko/square-root): 제곱근 계산기는 어떤 수를 제곱했을 때 입력값이 되는 실수 값을 구하는 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [팩토리얼 계산기 — n! 계산](https://utillica.com/ko/factorial): 팩토리얼 계산기는 정수 n부터 1까지의 모든 양의 정수를 곱한 n! 값을 구하는 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [순열·조합 계산기 — nPr nCr](https://utillica.com/ko/permutation-combination): 순열·조합 계산기는 n개 중 r개를 선택할 때 순서를 고려한 nPr과 순서를 고려하지 않는 nCr을 구하는 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [최대공약수·최소공배수 계산기](https://utillica.com/ko/gcd-lcm): 최대공약수·최소공배수 계산기는 두 정수의 공약수 중 가장 큰 값과 공배수 중 가장 작은 값을 구하는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [팁 계산기 — 인원별 팁과 총액 계산](https://utillica.com/ko/tip): 팁 계산기는 결제 금액과 팁 비율, 인원 수로 총액과 1인당 부담액을 계산하는 도구입니다.
  Sources: Percent
- [복리 계산기 — 원금·이율·기간 계산](https://utillica.com/ko/compound-interest): 복리 계산기는 원금에 이자가 다시 붙는 효과를 반영해 미래가치와 이자액을 구하는 도구입니다.
  Sources: Percent
- [대출 이자 계산기 — 원리금균등 월 상환액](https://utillica.com/ko/loan-interest): 대출 이자 계산기는 원리금균등 방식의 예상 월 상환액과 총 상환액을 계산하는 도구입니다.
  Sources: Percent
- [손익분기점 계산기 — BEP 수량 계산](https://utillica.com/ko/break-even): 손익분기점 계산기는 고정비를 단위 공헌이익으로 나누어 필요한 판매 수량을 구하는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [GPA 환산 계산기 — 한국 생활 계산기](https://utillica.com/ko/gpa): GPA 환산 계산기는 100점 만점 점수를 4.5 만점 GPA로 환산하는 브라우저 기반 한국 생활 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [학점 계산기 — 한국 생활 계산기](https://utillica.com/ko/grade): 학점 계산기는 총 평점과 이수 학점으로 평균 평점을 계산하는 브라우저 기반 한국 생활 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [신발 사이즈 변환기 — 한국 생활 계산기](https://utillica.com/ko/shoe-size): 신발 사이즈 변환기는 한국 mm 신발 사이즈를 US/EU 참고 사이즈로 환산하는 브라우저 기반 한국 생활 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [의류 사이즈 변환기 — 한국 생활 계산기](https://utillica.com/ko/clothing-size): 의류 사이즈 변환기는 가슴둘레 cm 기준으로 한국 의류 사이즈를 추정하는 브라우저 기반 한국 생활 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [반지 호수 변환기 — 한국 생활 계산기](https://utillica.com/ko/ring-size): 반지 호수 변환기는 반지 안지름 mm로 한국 반지 호수를 추정하는 브라우저 기반 한국 생활 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [주휴수당 계산기 — 한국 생활 계산기](https://utillica.com/ko/weekly-holiday-pay): 주휴수당 계산기는 시급과 주 소정근로시간으로 주휴수당을 계산하는 브라우저 기반 한국 생활 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [시급 계산기 — 한국 생활 계산기](https://utillica.com/ko/hourly-wage): 시급 계산기는 월급과 월 근로시간으로 시급을 계산하는 브라우저 기반 한국 생활 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [퇴직금 계산기 — 한국 생활 계산기](https://utillica.com/ko/severance-pay): 퇴직금 계산기는 평균임금과 계속근로일수로 퇴직금 예상액을 계산하는 브라우저 기반 한국 생활 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [적금/예금 계산기 — 한국 생활 계산기](https://utillica.com/ko/savings): 적금/예금 계산기는 월 납입액, 기간, 연 이율로 적금 만기 예상액을 계산하는 브라우저 기반 한국 생활 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [전월세 전환 계산기 — 한국 생활 계산기](https://utillica.com/ko/jeonse-monthly): 전월세 전환 계산기는 전세보증금 차액과 전월세 전환율로 월세를 계산하는 브라우저 기반 한국 생활 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [공급면적/전용면적 계산기 — 한국 생활 계산기](https://utillica.com/ko/housing-area): 공급면적/전용면적 계산기는 전용면적과 전용률로 공급면적을 추정하는 브라우저 기반 한국 생활 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [4대보험 계산기 — 한국 생활 계산기](https://utillica.com/ko/four-insurance): 4대보험 계산기는 월 보수 기준 근로자 부담 국민연금, 건강보험, 장기요양보험, 고용보험을 추정하는 브라우저 기반 한국 생활 계산기입니다.
  Sources: 2026 National Pension standard monthly income limits; 2026 National Health Insurance contribution rate; Earned income withholding tax table guide
- [연봉 실수령액 계산기 — 2026 월 실수령액](https://utillica.com/ko/net-salary): 연봉 실수령액 계산기는 연봉을 월급으로 나누고 4대보험과 입력한 원천징수세액을 차감해 월 실수령액을 추정하는 브라우저 기반 한국 생활 계산기입니다.
  Sources: 2026 National Pension standard monthly income limits; 2026 National Health Insurance contribution rate; Earned income withholding tax table guide
- [자동차세 계산기 — 한국 생활 계산기](https://utillica.com/ko/car-tax): 자동차세 계산기는 비영업용 승용차 배기량과 차령으로 연 자동차세와 지방교육세를 추정하는 브라우저 기반 한국 생활 계산기입니다.
  Sources: Passenger car ownership tax rates; Real estate acquisition tax guide; Local Tax Act Enforcement Decree Article 109
- [취득세 계산기 — 한국 생활 계산기](https://utillica.com/ko/acquisition-tax): 취득세 계산기는 주택 취득가액으로 기본 유상취득 취득세와 지방교육세를 추정하는 브라우저 기반 한국 생활 계산기입니다.
  Sources: Passenger car ownership tax rates; Real estate acquisition tax guide; Local Tax Act Enforcement Decree Article 109
- [재산세 계산기 — 한국 생활 계산기](https://utillica.com/ko/property-tax): 재산세 계산기는 주택 시가표준액과 공정시장가액비율로 재산세와 지방교육세를 추정하는 브라우저 기반 한국 생활 계산기입니다.
  Sources: Passenger car ownership tax rates; Real estate acquisition tax guide; Local Tax Act Enforcement Decree Article 109
- [실업급여 계산기 — 한국 노무·급여 계산기](https://utillica.com/ko/unemployment-benefit): 실업급여 계산기는 퇴직 전 평균임금, 나이, 고용보험 가입기간으로 구직급여 일액과 총액을 추정하는 브라우저 기반 한국 노무·급여 계산기입니다.
  Sources: 2026 minimum wage hourly rate and monthly conversion; Minimum Wage Council annual rates; Employment insurance unemployment benefit simulation guide; 2026 unemployment benefit cap adjustment; Annual paid leave under Labor Standards Act Article 60; Daily worker withholding income tax formula; Personal service business income 3.3% withholding; Parental leave benefit policy; Employment Insurance Act Enforcement Decree Article 95; Maternity leave benefit cap
- [연차 계산기 — 한국 노무·급여 계산기](https://utillica.com/ko/annual-leave): 연차 계산기는 근속 개월 수와 출근율, 사용 연차로 발생·잔여 연차를 추정하는 브라우저 기반 한국 노무·급여 계산기입니다.
  Sources: 2026 minimum wage hourly rate and monthly conversion; Minimum Wage Council annual rates; Employment insurance unemployment benefit simulation guide; 2026 unemployment benefit cap adjustment; Annual paid leave under Labor Standards Act Article 60; Daily worker withholding income tax formula; Personal service business income 3.3% withholding; Parental leave benefit policy; Employment Insurance Act Enforcement Decree Article 95; Maternity leave benefit cap
- [최저임금 계산기 — 한국 노무·급여 계산기](https://utillica.com/ko/minimum-wage): 최저임금 계산기는 시급 또는 월급이 2026년 최저임금 기준을 충족하는지 확인하는 브라우저 기반 한국 노무·급여 계산기입니다.
  Sources: 2026 minimum wage hourly rate and monthly conversion; Minimum Wage Council annual rates; Employment insurance unemployment benefit simulation guide; 2026 unemployment benefit cap adjustment; Annual paid leave under Labor Standards Act Article 60; Daily worker withholding income tax formula; Personal service business income 3.3% withholding; Parental leave benefit policy; Employment Insurance Act Enforcement Decree Article 95; Maternity leave benefit cap
- [일용직 소득세 계산기 — 한국 노무·급여 계산기](https://utillica.com/ko/daily-worker-tax): 일용직 소득세 계산기는 일급과 근무일수로 일용근로소득 원천징수 예상액을 계산하는 브라우저 기반 한국 노무·급여 계산기입니다.
  Sources: 2026 minimum wage hourly rate and monthly conversion; Minimum Wage Council annual rates; Employment insurance unemployment benefit simulation guide; 2026 unemployment benefit cap adjustment; Annual paid leave under Labor Standards Act Article 60; Daily worker withholding income tax formula; Personal service business income 3.3% withholding; Parental leave benefit policy; Employment Insurance Act Enforcement Decree Article 95; Maternity leave benefit cap
- [프리랜서 3.3% 세금 계산기 — 한국 노무·급여 계산기](https://utillica.com/ko/freelancer-tax-3-3): 프리랜서 3.3% 세금 계산기는 사업소득 원천징수 3.3%와 실수령액을 계산하는 브라우저 기반 한국 노무·급여 계산기입니다.
  Sources: 2026 minimum wage hourly rate and monthly conversion; Minimum Wage Council annual rates; Employment insurance unemployment benefit simulation guide; 2026 unemployment benefit cap adjustment; Annual paid leave under Labor Standards Act Article 60; Daily worker withholding income tax formula; Personal service business income 3.3% withholding; Parental leave benefit policy; Employment Insurance Act Enforcement Decree Article 95; Maternity leave benefit cap
- [육아휴직 급여 계산기 — 한국 노무·급여 계산기](https://utillica.com/ko/parental-leave-pay): 육아휴직 급여 계산기는 월 통상임금과 휴직 기간으로 육아휴직 급여 월별 예상액을 계산하는 브라우저 기반 한국 노무·급여 계산기입니다.
  Sources: 2026 minimum wage hourly rate and monthly conversion; Minimum Wage Council annual rates; Employment insurance unemployment benefit simulation guide; 2026 unemployment benefit cap adjustment; Annual paid leave under Labor Standards Act Article 60; Daily worker withholding income tax formula; Personal service business income 3.3% withholding; Parental leave benefit policy; Employment Insurance Act Enforcement Decree Article 95; Maternity leave benefit cap
- [출산휴가 급여 계산기 — 한국 노무·급여 계산기](https://utillica.com/ko/maternity-leave-pay): 출산휴가 급여 계산기는 통상임금, 우선지원대상 여부, 기간으로 출산휴가 급여 부담 구분을 추정하는 브라우저 기반 한국 노무·급여 계산기입니다.
  Sources: 2026 minimum wage hourly rate and monthly conversion; Minimum Wage Council annual rates; Employment insurance unemployment benefit simulation guide; 2026 unemployment benefit cap adjustment; Annual paid leave under Labor Standards Act Article 60; Daily worker withholding income tax formula; Personal service business income 3.3% withholding; Parental leave benefit policy; Employment Insurance Act Enforcement Decree Article 95; Maternity leave benefit cap
- [포괄임금제 계산기 — 한국 노무·급여 계산기](https://utillica.com/ko/inclusive-wage): 포괄임금제 계산기는 기본급과 고정 연장수당으로 최저임금 및 연장수당 기초 검토를 하는 브라우저 기반 한국 노무·급여 계산기입니다.
  Sources: 2026 minimum wage hourly rate and monthly conversion; Minimum Wage Council annual rates; Employment insurance unemployment benefit simulation guide; 2026 unemployment benefit cap adjustment; Annual paid leave under Labor Standards Act Article 60; Daily worker withholding income tax formula; Personal service business income 3.3% withholding; Parental leave benefit policy; Employment Insurance Act Enforcement Decree Article 95; Maternity leave benefit cap
- [증여세 계산기 — 한국 부동산·세금 계산기](https://utillica.com/ko/gift-tax): 증여세 계산기는 증여액, 관계, 공제, 세대생략 여부로 증여세를 추정하는 브라우저 기반 한국 부동산·세금 계산기입니다.
  Sources: Gift tax deduction table; Gift tax flow and generation-skip surcharge; Inheritance and gift tax rates; Inheritance deduction guide; Comprehensive real estate tax flow; Comprehensive real estate tax overview; Housing brokerage fee table; Real Estate Agent Act Enforcement Rule attached table; Housing deemed rent guide and 2025 deposit interest rate; Comprehensive income tax rate table
- [상속세 계산기 — 한국 부동산·세금 계산기](https://utillica.com/ko/inheritance-tax): 상속세 계산기는 상속재산과 공제, 상속인 수로 상속세 산출세액을 추정하는 브라우저 기반 한국 부동산·세금 계산기입니다.
  Sources: Gift tax deduction table; Gift tax flow and generation-skip surcharge; Inheritance and gift tax rates; Inheritance deduction guide; Comprehensive real estate tax flow; Comprehensive real estate tax overview; Housing brokerage fee table; Real Estate Agent Act Enforcement Rule attached table; Housing deemed rent guide and 2025 deposit interest rate; Comprehensive income tax rate table
- [종합부동산세 계산기 — 한국 부동산·세금 계산기](https://utillica.com/ko/comprehensive-real-estate-tax): 종합부동산세 계산기는 공시가격 합계, 주택 수, 공제, 공정시장가액비율로 종부세를 추정하는 브라우저 기반 한국 부동산·세금 계산기입니다.
  Sources: Gift tax deduction table; Gift tax flow and generation-skip surcharge; Inheritance and gift tax rates; Inheritance deduction guide; Comprehensive real estate tax flow; Comprehensive real estate tax overview; Housing brokerage fee table; Real Estate Agent Act Enforcement Rule attached table; Housing deemed rent guide and 2025 deposit interest rate; Comprehensive income tax rate table
- [중개수수료 계산기 — 한국 부동산·세금 계산기](https://utillica.com/ko/brokerage-fee): 중개수수료 계산기는 거래 유형과 금액으로 주택 중개보수 상한액과 부가세를 계산하는 브라우저 기반 한국 부동산·세금 계산기입니다.
  Sources: Gift tax deduction table; Gift tax flow and generation-skip surcharge; Inheritance and gift tax rates; Inheritance deduction guide; Comprehensive real estate tax flow; Comprehensive real estate tax overview; Housing brokerage fee table; Real Estate Agent Act Enforcement Rule attached table; Housing deemed rent guide and 2025 deposit interest rate; Comprehensive income tax rate table
- [국민주택채권 계산기 — 한국 부동산·세금 계산기](https://utillica.com/ko/national-housing-bond): 국민주택채권 계산기는 매입 기준 금액, 채권 매입률, 할인율로 즉시매도 부담액을 계산하는 브라우저 기반 한국 부동산·세금 계산기입니다.
  Sources: Gift tax deduction table; Gift tax flow and generation-skip surcharge; Inheritance and gift tax rates; Inheritance deduction guide; Comprehensive real estate tax flow; Comprehensive real estate tax overview; Housing brokerage fee table; Real Estate Agent Act Enforcement Rule attached table; Housing deemed rent guide and 2025 deposit interest rate; Comprehensive income tax rate table
- [DSR/DTI/LTV 계산기 — 한국 부동산·세금 계산기](https://utillica.com/ko/dsr-dti-ltv): DSR/DTI/LTV 계산기는 소득, 부채상환액, 담보가, 대출액으로 대출 비율과 참고 한도를 계산하는 브라우저 기반 한국 부동산·세금 계산기입니다.
  Sources: Gift tax deduction table; Gift tax flow and generation-skip surcharge; Inheritance and gift tax rates; Inheritance deduction guide; Comprehensive real estate tax flow; Comprehensive real estate tax overview; Housing brokerage fee table; Real Estate Agent Act Enforcement Rule attached table; Housing deemed rent guide and 2025 deposit interest rate; Comprehensive income tax rate table
- [임대수익률 계산기 — 한국 부동산·세금 계산기](https://utillica.com/ko/rental-yield): 임대수익률 계산기는 매입가, 보증금, 월세, 비용으로 총·순 임대수익률을 계산하는 브라우저 기반 한국 부동산·세금 계산기입니다.
  Sources: Gift tax deduction table; Gift tax flow and generation-skip surcharge; Inheritance and gift tax rates; Inheritance deduction guide; Comprehensive real estate tax flow; Comprehensive real estate tax overview; Housing brokerage fee table; Real Estate Agent Act Enforcement Rule attached table; Housing deemed rent guide and 2025 deposit interest rate; Comprehensive income tax rate table
- [간주임대료 계산기 — 한국 부동산·세금 계산기](https://utillica.com/ko/deemed-rent): 간주임대료 계산기는 보증금, 공제금액, 정기예금이자율로 주택 간주임대료를 추정하는 브라우저 기반 한국 부동산·세금 계산기입니다.
  Sources: Gift tax deduction table; Gift tax flow and generation-skip surcharge; Inheritance and gift tax rates; Inheritance deduction guide; Comprehensive real estate tax flow; Comprehensive real estate tax overview; Housing brokerage fee table; Real Estate Agent Act Enforcement Rule attached table; Housing deemed rent guide and 2025 deposit interest rate; Comprehensive income tax rate table
- [연말정산 환급 계산기 — 한국 부동산·세금 계산기](https://utillica.com/ko/year-end-tax-refund): 연말정산 환급 계산기는 총급여, 기납부세액, 공제 입력으로 예상 결정세액과 환급액을 계산하는 브라우저 기반 한국 부동산·세금 계산기입니다.
  Sources: Gift tax deduction table; Gift tax flow and generation-skip surcharge; Inheritance and gift tax rates; Inheritance deduction guide; Comprehensive real estate tax flow; Comprehensive real estate tax overview; Housing brokerage fee table; Real Estate Agent Act Enforcement Rule attached table; Housing deemed rent guide and 2025 deposit interest rate; Comprehensive income tax rate table
- [종합소득세 계산기 — 한국 부동산·세금 계산기](https://utillica.com/ko/comprehensive-income-tax): 종합소득세 계산기는 소득, 필요경비, 공제, 세액공제로 종합소득세를 추정하는 브라우저 기반 한국 부동산·세금 계산기입니다.
  Sources: Gift tax deduction table; Gift tax flow and generation-skip surcharge; Inheritance and gift tax rates; Inheritance deduction guide; Comprehensive real estate tax flow; Comprehensive real estate tax overview; Housing brokerage fee table; Real Estate Agent Act Enforcement Rule attached table; Housing deemed rent guide and 2025 deposit interest rate; Comprehensive income tax rate table
- [분수 계산기 — 사칙연산과 약분](https://utillica.com/ko/fraction): 분수 계산기는 두 분수의 사칙연산을 수행하고 결과를 기약분수로 약분하는 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [소수 판별기 — 정수 소수 여부 확인](https://utillica.com/ko/prime-checker): 소수 판별기는 입력한 정수가 1과 자기 자신만 약수로 갖는 소수인지 확인하는 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [소인수분해 계산기 — 정수를 소수의 곱으로 분해](https://utillica.com/ko/prime-factorization): 소인수분해 계산기는 정수를 소수들의 곱으로 분해해 보여주는 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [이차방정식 계산기 — 근의 공식](https://utillica.com/ko/quadratic): 이차방정식 계산기는 ax²+bx+c=0의 계수 a, b, c로 판별식과 근을 구하는 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [표준편차 계산기 — 모집단 표준편차](https://utillica.com/ko/standard-deviation): 표준편차 계산기는 숫자들이 평균에서 얼마나 퍼져 있는지 나타내는 표준편차를 계산하는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [중앙값 계산기 — 숫자 목록의 중간값](https://utillica.com/ko/median): 중앙값 계산기는 숫자 목록을 정렬했을 때 가운데에 있는 값을 구하는 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [백분위수 계산기 — p번째 백분위 값](https://utillica.com/ko/percentile): 백분위수 계산기는 정렬된 데이터에서 지정한 백분위 위치의 값을 계산하는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [원 넓이 계산기 — 반지름으로 면적 계산](https://utillica.com/ko/circle-area): 원 넓이 계산기는 반지름 r로 πr² 공식을 적용해 원의 면적을 구하는 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [삼각형 넓이 계산기 — 밑변과 높이](https://utillica.com/ko/triangle-area): 삼각형 넓이 계산기는 밑변과 높이를 곱한 뒤 2로 나누어 삼각형 면적을 구하는 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [사각형 넓이 계산기 — 가로와 세로](https://utillica.com/ko/rectangle-area): 사각형 넓이 계산기는 가로와 세로를 곱해 직사각형 면적을 구하는 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [구 부피 계산기 — 반지름으로 부피 계산](https://utillica.com/ko/sphere-volume): 구 부피 계산기는 반지름 r로 4/3πr³ 공식을 적용해 구의 부피를 구하는 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [원기둥 부피 계산기 — 반지름과 높이](https://utillica.com/ko/cylinder-volume): 원기둥 부피 계산기는 밑면 원의 넓이 πr²에 높이 h를 곱해 원기둥 부피를 구하는 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [피타고라스 계산기 — 직각삼각형 빗변](https://utillica.com/ko/pythagorean): 피타고라스 계산기는 직각삼각형의 두 직각변 a, b로 빗변 c를 구하는 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [카운터 — 클릭 수량 세기](https://utillica.com/ko/tally-counter): 카운터는 버튼 클릭으로 숫자를 증가, 감소, 초기화하며 수량을 수동으로 집계하는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [Sales Tax 계산기 — 글로벌 SEO 계산기](https://utillica.com/ko/sales-tax): Sales Tax 계산기는 가격과 직접 입력한 세율로 세액과 총액을 계산하는 브라우저 기반 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [과학적 표기법 변환기 — 글로벌 SEO 계산기](https://utillica.com/ko/scientific-notation): 과학적 표기법 변환기는 숫자를 계수와 10의 지수 형태로 변환하는 브라우저 기반 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [유효숫자 계산기 — 글로벌 SEO 계산기](https://utillica.com/ko/significant-figures): 유효숫자 계산기는 숫자를 지정한 유효숫자 개수로 반올림하는 브라우저 기반 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Square Footage 계산기 — 글로벌 SEO 계산기](https://utillica.com/ko/square-footage): Square Footage 계산기는 방 길이와 너비로 제곱피트 면적과 예상 비용을 계산하는 브라우저 기반 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [상환 스케줄 계산기 — 글로벌 SEO 계산기](https://utillica.com/ko/amortization-schedule): 상환 스케줄 계산기는 원금, APR, 기간으로 월 상환액과 상환 내역을 계산하는 브라우저 기반 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [매크로 계산기 — 글로벌 SEO 계산기](https://utillica.com/ko/macro-calculator): 매크로 계산기는 Mifflin-St Jeor 공식으로 목표 칼로리와 탄단지를 추정하는 브라우저 기반 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [단백질 계산기 — 글로벌 SEO 계산기](https://utillica.com/ko/protein-calculator): 단백질 계산기는 몸무게와 g/kg 목표값으로 일일 단백질 범위를 계산하는 브라우저 기반 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [수면 사이클 계산기 — 글로벌 SEO 계산기](https://utillica.com/ko/sleep-cycle): 수면 사이클 계산기는 90분 수면 사이클 기준으로 취침 또는 기상 추천 시간을 계산하는 브라우저 기반 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Percent Error 계산기 — 글로벌 SEO 계산기](https://utillica.com/ko/percent-error): Percent Error 계산기는 측정값과 참값의 절대 오차와 백분율 오차를 계산하는 브라우저 기반 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [기울기 계산기 — 글로벌 SEO 계산기](https://utillica.com/ko/slope-calculator): 기울기 계산기는 두 점으로 직선의 기울기와 y절편을 계산하는 브라우저 기반 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [김장 재료 계산기 — 브라우저 생활 도구](https://utillica.com/ko/kimchi-ingredient-calculator): 김장 재료 계산기는 배추 무게 기준 김장 양념 재료량을 추정하는 도구 브라우저 기반 생활 보조 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [옴의 법칙 계산기 — 전압·전류·저항·전력 계산](https://utillica.com/ko/ohms-law): 옴의 법칙 계산기는 V = I × R과 P = V × I 공식으로 전압, 전류, 저항, 전력 네 값 중 두 개를 입력하면 나머지 두 값을 구하는 계산기입니다.
  Sources: BIPM — The International System of Units (SI Brochure); IEC Electropedia — International Electrotechnical Vocabulary; MDN Web Docs: Client-side web APIs
- [와트 → 암페어 계산기 — DC·AC 단상·삼상 전류 계산](https://utillica.com/ko/watts-to-amps): 와트 → 암페어 계산기는 전력(W), 전압(V), 역률(PF)로 DC·AC 단상·AC 삼상 회로의 전류(A)를 구하는 계산기입니다.
  Sources: BIPM — The International System of Units (SI Brochure); IEC Electropedia — International Electrotechnical Vocabulary; MDN Web Docs: Client-side web APIs
- [암페어 → 와트 계산기 — DC·AC 단상·삼상 전력 계산](https://utillica.com/ko/amps-to-watts): 암페어 → 와트 계산기는 전류(A), 전압(V), 역률(PF)로 DC·AC 단상·AC 삼상 회로의 유효전력(W)을 구하는 계산기입니다.
  Sources: BIPM — The International System of Units (SI Brochure); IEC Electropedia — International Electrotechnical Vocabulary; MDN Web Docs: Client-side web APIs
- [와트 → kWh 계산기 — 소비전력과 사용시간으로 전력량 계산](https://utillica.com/ko/watts-to-kwh): 와트 → kWh 계산기는 소비전력(W)에 사용시간을 곱하고 1000으로 나눠 전기요금 부과 단위인 전력량(kWh)을 구하는 계산기입니다.
  Sources: BIPM — The International System of Units (SI Brochure); IEC Electropedia — International Electrotechnical Vocabulary; MDN Web Docs: Client-side web APIs
- [전기요금 계산기 — 주택용 누진제 요금 계산](https://utillica.com/ko/electricity-bill): 전기요금 계산기는 월 사용량(kWh)에 한국 주택용 누진제 요금표를 적용해 기본요금, 전력량요금, 기후환경요금, 연료비조정액과 부가가치세, 전력산업기반기금까지 포함한 예상 청구액을 구하는 계산기입니다.
  Sources: 한국전력공사 전기요금표 — 주택용 전력; MDN Web Docs: Client-side web APIs
- [kVA → 암페어 계산기 — 단상·삼상 전류 계산](https://utillica.com/ko/kva-to-amps): kVA → 암페어 계산기는 피상전력(kVA)과 전압(V)으로 단상은 I = 1000 × kVA ÷ V, 삼상은 I = 1000 × kVA ÷ (√3 × V) 공식으로 전류를 구하는 계산기입니다.
  Sources: BIPM — The International System of Units (SI Brochure); IEC Electropedia — International Electrotechnical Vocabulary; MDN Web Docs: Client-side web APIs
- [암페어 → kVA 계산기 — 단상·삼상 피상전력 계산](https://utillica.com/ko/amps-to-kva): 암페어 → kVA 계산기는 전류(A)와 전압(V)으로 단상은 kVA = V × I ÷ 1000, 삼상은 kVA = √3 × V × I ÷ 1000 공식으로 피상전력을 구하는 계산기입니다.
  Sources: BIPM — The International System of Units (SI Brochure); IEC Electropedia — International Electrotechnical Vocabulary; MDN Web Docs: Client-side web APIs
- [역률 계산기 — kW와 kVA로 역률·무효전력 계산](https://utillica.com/ko/power-factor): 역률 계산기는 유효전력(kW)을 피상전력(kVA)으로 나눠 역률(PF)을 구하고, √(kVA² − kW²)로 무효전력(kvar)까지 계산하는 도구입니다.
  Sources: BIPM — The International System of Units (SI Brochure); IEC Electropedia — International Electrotechnical Vocabulary; MDN Web Docs: Client-side web APIs
- [전압 분배 계산기 — R1/R2 저항 분압 계산](https://utillica.com/ko/voltage-divider): 전압 분배 계산기는 직렬 저항 R1, R2에 걸리는 전압 비율을 이용해 Vout = Vin × R2 ÷ (R1 + R2) 공식으로 출력 전압을 구하는 계산기입니다.
  Sources: BIPM — The International System of Units (SI Brochure); IEC Electropedia — International Electrotechnical Vocabulary; MDN Web Docs: Client-side web APIs
- [저항 색띠 계산기 — 4밴드·5밴드 저항값 읽기](https://utillica.com/ko/resistor-color-code): 저항 색띠 계산기는 IEC 60062 색 코드 규격에 따라 4밴드·5밴드 저항의 색띠를 숫자와 배율, 허용오차로 변환해 저항값을 구하는 도구입니다.
  Sources: IEC 60062 — Marking codes for resistors and capacitors; IEC Electropedia — International Electrotechnical Vocabulary; MDN Web Docs: Client-side web APIs
- [mAh → Wh 변환기 — 배터리 용량을 와트시로 계산](https://utillica.com/ko/mah-to-wh): mAh → Wh 변환기는 배터리 용량(mAh)에 전압(V)을 곱하고 1000으로 나눠 에너지(Wh)를 구하는 계산기입니다.
  Sources: BIPM — The International System of Units (SI Brochure); IEC Electropedia — International Electrotechnical Vocabulary; MDN Web Docs: Client-side web APIs
- [Wh → mAh 변환기 — 와트시를 배터리 용량으로 계산](https://utillica.com/ko/wh-to-mah): Wh → mAh 변환기는 에너지(Wh)에 1000을 곱하고 전압(V)으로 나눠 배터리 용량(mAh)을 구하는 계산기입니다.
  Sources: BIPM — The International System of Units (SI Brochure); IEC Electropedia — International Electrotechnical Vocabulary; MDN Web Docs: Client-side web APIs
- [칼로리 계산기 — 하루 권장 섭취량·TDEE](https://utillica.com/ko/calorie-calculator): 칼로리 계산기는 Mifflin-St Jeor 공식으로 기초대사량(BMR)을 구한 뒤 활동계수를 곱해 하루 유지 칼로리(TDEE)와 감량·증량 목표 칼로리를 계산하는 도구입니다.
  Sources: A new predictive equation for resting energy expenditure in healthy individuals (Mifflin-St Jeor, 1990); The Harris Benedict equation reevaluated (Roza & Shizgal, 1984)
- [기초대사량 계산기 — BMR(Mifflin·Harris-Benedict)](https://utillica.com/ko/bmr-calculator): 기초대사량 계산기는 성별·나이·키·몸무게로 생명 유지에 필요한 최소 에너지(BMR)를 Mifflin-St Jeor와 Harris-Benedict 두 공식으로 계산해 비교하는 도구입니다.
  Sources: A new predictive equation for resting energy expenditure in healthy individuals (Mifflin-St Jeor, 1990); The Harris Benedict equation reevaluated (Roza & Shizgal, 1984)
- [체지방률 계산기 — US Navy 둘레법](https://utillica.com/ko/body-fat-calculator): 체지방률 계산기는 줄자로 잰 목·허리(여성은 엉덩이 포함) 둘레와 키로 미 해군(US Navy) 둘레법 체지방률을 추정하는 도구입니다.
  Sources: Prediction of percent body fat for U.S. Navy men from body circumferences and height (Hodgdon & Beckett, 1984); Body mass index as a measure of body fatness: age- and sex-specific prediction formulas (Deurenberg, 1991); Percent body fat norms for men and women
- [표준체중 계산기 — Devine·Robinson·Miller·BMI 22](https://utillica.com/ko/ideal-weight-calculator): 표준체중 계산기는 키와 성별로 Devine·Robinson·Miller 공식과 BMI 22 기준값을 계산해 표준체중 범위를 보여주는 도구입니다.
  Sources: The origin of the "ideal" body weight equations (Pai & Paloucek, 2000); Appropriate body-mass index for Asian populations
- [러닝 페이스 계산기 — 거리·시간·페이스](https://utillica.com/ko/pace-calculator): 러닝 페이스 계산기는 거리·시간·페이스 세 값 중 두 개를 입력하면 나머지 하나를 계산하고, 5K·10K·하프·풀코스 예상 완주 시간을 보여주는 도구입니다.
  Sources: World Athletics Book of Rules — road race distances
- [운동 소모 칼로리 계산기 — MET 기준](https://utillica.com/ko/calories-burned): 운동 소모 칼로리 계산기는 활동별 MET 값과 체중, 운동 시간을 곱해 운동으로 소모한 칼로리를 추정하는 도구입니다.
  Sources: 2011 Compendium of Physical Activities: a second update of codes and MET values; Compendium of Physical Activities
- [혈중알코올농도 계산기 — 위드마크 공식](https://utillica.com/ko/bac-calculator): 혈중알코올농도(BAC) 계산기는 위드마크(Widmark) 공식으로 음주량·도수·체중·경과 시간에 따른 혈중알코올농도를 추정하는 도구입니다.
  Sources: 도로교통법 제44조·제148조의2 — 음주운전 금지 및 처벌; 음주운전 금지 등 (찾기쉬운 생활법령정보); The estimation of blood alcohol concentration: Widmark revisited (Posey & Mozayani, 2007)
- [하루 물 섭취량 계산기 — 체중·활동 기준](https://utillica.com/ko/water-intake): 하루 물 섭취량 계산기는 체중 1kg당 30~35ml 기준에 운동 시간에 따른 추가분을 더해 일일 수분 섭취 권장 범위를 계산하는 도구입니다.
  Sources: Scientific Opinion on Dietary Reference Values for water; Dietary Reference Intakes for Water, Potassium, Sodium, Chloride, and Sulfate
- [단리 계산기 — 원금·이율·기간으로 이자 계산](https://utillica.com/ko/simple-interest): 단리 계산기는 원금에만 이자가 붙는 단리 방식으로 이자와 만기 금액을 구하는 계산기입니다.
  Sources: Simple Interest; Compound interest calculator
- [자동차 할부 계산기 — 월 납입금·총이자 계산](https://utillica.com/ko/auto-loan): 자동차 할부 계산기는 차량 가격에서 선수금을 뺀 할부 원금에 원리금균등 공식을 적용해 월 납입금과 총이자를 구하는 모의계산 도구입니다.
  Sources: FINE — financial product comparison portal; Korea Federation of Banks consumer portal; Auto loans — understanding monthly payments
- [중도상환수수료 계산기 — 대출 조기상환 수수료](https://utillica.com/ko/prepayment-fee): 중도상환수수료 계산기는 중도상환금액 × 수수료율 × (잔존일수 ÷ 대출기간일수)의 일반적인 슬라이딩 방식으로 수수료를 추정하는 모의계산 도구입니다.
  Sources: FINE — financial product comparison portal; Korea Federation of Banks consumer portal
- [목표 저축 계산기 — 목표 금액까지 월 저축액 계산](https://utillica.com/ko/savings-goal): 목표 저축 계산기는 목표 금액과 기간, 연 수익률로 매달 저축해야 할 금액을 역산하는 계산기입니다.
  Sources: Savings goal calculator
- [단위가격 비교 계산기 — 대용량 vs 소용량 어느 쪽이 이득?](https://utillica.com/ko/unit-price): 단위가격 비교 계산기는 가격 ÷ 용량으로 두 상품의 단위(100g·100ml)당 가격을 구해 어느 쪽이 더 저렴한지 알려주는 계산기입니다.
  Sources: NIST Handbook 130 — Uniform Unit Pricing Regulation
- [연비·주유비 계산기 — 거리와 연비로 기름값 계산](https://utillica.com/ko/fuel-cost): 연비·주유비 계산기는 주행 거리를 연비로 나눠 필요한 연료량을 구하고 리터당 유가를 곱해 주유비를 계산하는 도구입니다.
  Sources: Fuel economy label calculations; NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [속력·거리·시간 계산기 — 두 값으로 나머지 구하기](https://utillica.com/ko/speed-distance-time): 속력·거리·시간 계산기는 v = d ÷ t 관계식으로 세 값 중 두 값을 알 때 나머지 하나를 구하는 계산기입니다.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [기말고사 필요 점수 계산기 — 목표 성적 역산](https://utillica.com/ko/final-grade): 기말고사 필요 점수 계산기는 (목표 성적 - 현재 성적 × (1 - 기말 반영비율)) ÷ 기말 반영비율 공식으로 기말에서 필요한 최소 점수를 역산하는 계산기입니다.
  Sources: Percent
- [시험 점수 채점 계산기 — 문항 수와 오답으로 점수·등급](https://utillica.com/ko/test-grade): 시험 점수 채점 계산기는 (문항 수 - 오답 수) ÷ 문항 수 × 100으로 점수를 구하고 문자 등급(A+~F)을 함께 보여주는 채점 도구입니다.
  Sources: Percent
- [몰 질량 계산기 — 화학식으로 g/mol 계산](https://utillica.com/ko/molar-mass): 몰 질량 계산기는 화학식을 파싱해 각 원소의 IUPAC 표준 원자량에 원자 수를 곱해 더한 몰 질량(g/mol)을 구하는 계산기입니다.
  Sources: Standard atomic weights; Periodic Table of Elements
- [강아지 나이 계산기 — 사람 나이로 환산 (견종 크기별)](https://utillica.com/ko/dog-age): 강아지 나이 계산기는 첫해 15살, 둘째 해 9살, 이후 매년 견종 크기별 4~6살을 더하는 방식으로 강아지 나이를 사람 나이로 환산하는 계산기입니다.
  Sources: Quantitative translation of dog-to-human aging (epigenetic clock); How to calculate dog years to human years
- [고양이 나이 계산기 — 사람 나이로 환산](https://utillica.com/ko/cat-age): 고양이 나이 계산기는 첫해 15살, 둘째 해 9살, 이후 매년 4살씩 더하는 국제 수의학계 통용 기준으로 고양이 나이를 사람 나이로 환산하는 계산기입니다.
  Sources: How to tell your cat’s age in human years; 2021 AAHA/AAFP Feline Life Stage Guidelines
- [부동산 양도소득세 계산기 — 1세대1주택 비과세·장특공제·2026 세율](https://utillica.com/ko/capital-gains-tax): 부동산 양도소득세 계산기는 양도가액, 취득가액, 필요경비, 보유·거주기간을 입력하면 장기보유특별공제와 기본공제 250만원, 2026년 6~45% 누진세율, 지방소득세 10%를 적용해 예상 세액을 계산하는 브라우저 기반 계산기입니다.
  Sources: Income Tax Act: capital gains rates and long-term holding deduction (Articles 89, 95, 104); Comprehensive income tax rate table (same 6-45% progressive brackets); Hometax capital gains tax mock calculation service
- [건폐율·용적률 계산기 — 용도지역별 상한 확인](https://utillica.com/ko/building-coverage-ratio): 건폐율·용적률 계산기는 대지면적, 건축면적, 연면적을 입력하면 건폐율(건축면적÷대지면적×100)과 용적률(연면적÷대지면적×100)을 계산하고 국토계획법 시행령의 용도지역별 상한과 비교하는 브라우저 기반 계산기입니다.
  Sources: National Land Planning and Utilization Act (Articles 77, 78); National Land Planning Act Enforcement Decree (Articles 84, 85 zoning caps); Building Act Enforcement Decree (Article 119 area calculation)
- [부동산 등기비용 계산기 — 취득세·국민주택채권·법무사 보수 개산](https://utillica.com/ko/registration-cost): 부동산 등기비용 계산기는 주택 매매가를 기준으로 취득세, 지방교육세, 농어촌특별세, 국민주택채권 즉시매도 부담액, 법무사 보수 개산액을 합산해 소유권이전등기 총비용을 추정하는 브라우저 기반 계산기입니다.
  Sources: Local Tax Act: acquisition tax and local education tax rates; Real estate acquisition tax guide; National Housing Bond purchase rates by region and standard value; Korea Association of Certified Judicial Scriveners fee standards
- [어학점수 변환기 — 토익·토플·아이엘츠·오픽·토익스피킹 환산표](https://utillica.com/ko/language-score-converter): 어학점수 변환기는 TOEIC, TOEFL iBT, IELTS 점수를 입력하면 같은 수준으로 통용되는 점수 밴드로 상호 환산하고 OPIc 등급과 TOEIC Speaking 점수대를 참고로 보여주는 브라우저 기반 변환기입니다.
  Sources: IELTS and TOEFL official score comparison; TOEIC program score information; OPIc rating scale (ACTFL proficiency levels); TOEIC and TOEIC Speaking Korea official site
- [더치페이 계산기 — 부분 참여 항목까지 정산](https://utillica.com/ko/dutch-pay): 더치페이 계산기는 항목별 결제자·금액·참여자를 기준으로 각 사람의 실제 결제액과 부담액을 비교해 최소 송금표를 만드는 브라우저 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs; Arithmetic mean
- [술자리 정산기 — 참여 시간 가중 더치페이](https://utillica.com/ko/drinking-settlement): 술자리 정산기는 각 사람의 참여 시간을 가중치로 삼아 총 금액을 배분하고 실제 결제액과 비교해 송금표를 만드는 브라우저 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs; Arithmetic mean
- [주식 평단가 계산기 — 물타기 후 평균단가](https://utillica.com/ko/stock-average-price): 주식 평단가 계산기는 기존 매수금액과 추가 매수금액을 합산한 뒤 총 수량으로 나누어 추가 매수 후 평균단가를 구하는 브라우저 계산기입니다.
  Sources: Cost basis; MDN Web Docs: Client-side web APIs
- [커피 추출 비율 계산기 — 원두와 물 비율](https://utillica.com/ko/coffee-brew-ratio): 커피 추출 비율 계산기는 원두 무게에 물 비율을 곱해 필요한 물의 양을 구하는 홈카페 브루잉 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs; Arithmetic operations
- [소주 도수 희석 계산기 — 목표 도수 물 비율](https://utillica.com/ko/soju-dilution): 소주 도수 희석 계산기는 알코올량 보존식을 이용해 목표 도수까지 낮추려면 물을 얼마나 더해야 하는지 계산하는 비율 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; Arithmetic operations
- [수하물 무게 배분 계산기 — 가방별 한도 확인](https://utillica.com/ko/baggage-weight-distribution): 수하물 무게 배분 계산기는 전체 짐을 여러 가방에 균등하게 나눴을 때 가방당 무게와 항공사 제한 대비 여유 또는 초과분을 계산하는 여행 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; Arithmetic operations
- [대출 갈아타기 손익분기 계산기 — 비용 회수 개월](https://utillica.com/ko/loan-refinance-break-even): 대출 갈아타기 손익분기 계산기는 금리 차이로 줄어드는 단순 월 이자와 수수료 회수까지 걸리는 개월 수를 계산하는 금융 산술 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; Arithmetic operations
- [레시피 스케일러 — 브라우저 계산기](https://utillica.com/ko/recipe-scaler): 레시피 스케일러는 기존 인분과 목표 인분 비율로 재료 수량을 일괄 환산하는 도구 브라우저 기반 생활 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs; Arithmetic operations
- [반려동물 사료량 계산기 — 브라우저 계산기](https://utillica.com/ko/pet-food-calculator): 반려동물 사료량 계산기는 체중·활동계수·사료 열량으로 하루 급여량을 계산하는 도구 브라우저 기반 생활 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs; Arithmetic operations
- [FIRE 계산기 — 브라우저 계산기](https://utillica.com/ko/fire-calculator): FIRE 계산기는 목표 생활비와 저축액 기준 재정독립까지 걸리는 기간을 추정하는 도구 브라우저 기반 생활 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs; Arithmetic operations
- [적금 풍차돌리기 시뮬레이터 — 브라우저 계산기](https://utillica.com/ko/savings-ladder): 적금 풍차돌리기 시뮬레이터는 매월 새 적금을 시작하는 풍차돌리기 만기 흐름을 추정하는 도구 브라우저 기반 생활 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs; Arithmetic operations
- [러닝 레이스 예측기 — 브라우저 계산기](https://utillica.com/ko/running-race-predictor): 러닝 레이스 예측기는 최근 기록으로 다른 거리 예상 기록을 계산하는 도구 브라우저 기반 생활 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs; Arithmetic operations
- [심박존 계산기 — 브라우저 계산기](https://utillica.com/ko/heart-rate-zone): 심박존 계산기는 최대심박과 안정심박 기준 Karvonen 훈련 구간을 계산하는 도구 브라우저 기반 생활 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs; Arithmetic operations
- [페인트·도배·타일 소요량 계산기 — 브라우저 계산기](https://utillica.com/ko/paint-wallpaper-tile-calculator): 페인트·도배·타일 소요량 계산기는 면적과 제품 커버리지 기준 필요한 캔·롤·박스 수를 계산하는 도구 브라우저 기반 생활 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs; Arithmetic operations
- [커튼·블라인드 치수 계산기 — 브라우저 계산기](https://utillica.com/ko/curtain-blind-size): 커튼·블라인드 치수 계산기는 창 실측값과 주름 배수 기준 주문 치수를 계산하는 도구 브라우저 기반 생활 계산기입니다.
  Sources: MDN Web Docs: Client-side web APIs; Arithmetic operations
- [원페이스 훈련 페이스표 — 브라우저 일정 도구](https://utillica.com/ko/one-pace-training-table): 원페이스 훈련 페이스표는 목표 거리·시간 기준 일정 페이스와 구간별 누적 시간을 계산하는 도구 브라우저 기반 시간·일정 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification

## 네트워크

Category hub: https://utillica.com/ko/category/network

- [내 IP 주소 확인 (What is my IP)](https://utillica.com/ko/what-is-my-ip): 내 IP 도구는 현재 요청의 공인 IP 주소(IPv4 또는 IPv6)를 서버에서 감지해 표시하는 도구입니다.
  Sources: HTTP Semantics
- [DNS Lookup — 서버 진단 도구](https://utillica.com/ko/dns-lookup): DNS Lookup는 도메인를 입력해 도메인의 A, AAAA, CNAME, MX, NS, TXT 레코드를 확인하는 서버 기반 유틸리티입니다.
  Sources: HTTP Semantics; The robots.txt file format; Sitemaps XML protocol; The Open Graph protocol; WHOIS Protocol Specification; The Transport Layer Security (TLS) Protocol Version 1.3
- [IP 확장 진단 — 서버 진단 도구](https://utillica.com/ko/ip-diagnostics): IP 확장 진단는 도메인 또는 IP를 입력해 도메인 또는 IP의 해석 주소, IP 버전, 공개 주소 여부, reverse DNS를 확인하는 서버 기반 유틸리티입니다.
  Sources: HTTP Semantics; The robots.txt file format; Sitemaps XML protocol; The Open Graph protocol; WHOIS Protocol Specification; The Transport Layer Security (TLS) Protocol Version 1.3
- [WHOIS Lookup — 서버 진단 도구](https://utillica.com/ko/whois-lookup): WHOIS Lookup는 도메인를 입력해 도메인의 공개 WHOIS 등록 정보를 조회하는 서버 기반 유틸리티입니다.
  Sources: HTTP Semantics; The robots.txt file format; Sitemaps XML protocol; The Open Graph protocol; WHOIS Protocol Specification; The Transport Layer Security (TLS) Protocol Version 1.3
- [SSL 인증서 체커 — 서버 진단 도구](https://utillica.com/ko/ssl-checker): SSL 인증서 체커는 도메인를 입력해 도메인의 443 포트 TLS 인증서 발급자, 주체, 만료일, 남은 일수를 확인하는 서버 기반 유틸리티입니다.
  Sources: HTTP Semantics; The robots.txt file format; Sitemaps XML protocol; The Open Graph protocol; WHOIS Protocol Specification; The Transport Layer Security (TLS) Protocol Version 1.3
- [HTTP 헤더 체커 — 서버 진단 도구](https://utillica.com/ko/http-header-checker): HTTP 헤더 체커는 URL를 입력해 URL의 상태 코드와 응답 헤더를 확인하는 서버 기반 유틸리티입니다.
  Sources: HTTP Semantics; The robots.txt file format; Sitemaps XML protocol; The Open Graph protocol; WHOIS Protocol Specification; The Transport Layer Security (TLS) Protocol Version 1.3
- [robots.txt 체커 — 서버 진단 도구](https://utillica.com/ko/robots-checker): robots.txt 체커는 URL를 입력해 사이트의 robots.txt 존재 여부와 주요 줄을 확인하는 서버 기반 유틸리티입니다.
  Sources: HTTP Semantics; The robots.txt file format; Sitemaps XML protocol; The Open Graph protocol; WHOIS Protocol Specification; The Transport Layer Security (TLS) Protocol Version 1.3
- [사이트맵 체커 — 서버 진단 도구](https://utillica.com/ko/sitemap-checker): 사이트맵 체커는 URL를 입력해 사이트의 sitemap.xml 존재 여부와 주요 줄을 확인하는 서버 기반 유틸리티입니다.
  Sources: HTTP Semantics; The robots.txt file format; Sitemaps XML protocol; The Open Graph protocol; WHOIS Protocol Specification; The Transport Layer Security (TLS) Protocol Version 1.3
- [URL 미리보기 — 서버 진단 도구](https://utillica.com/ko/url-preview): URL 미리보기는 URL를 입력해 페이지 제목, 설명, canonical, Open Graph 메타데이터를 요약하는 서버 기반 유틸리티입니다.
  Sources: HTTP Semantics; The robots.txt file format; Sitemaps XML protocol; The Open Graph protocol; WHOIS Protocol Specification; The Transport Layer Security (TLS) Protocol Version 1.3
- [Open Graph 체커 — 서버 진단 도구](https://utillica.com/ko/open-graph-checker): Open Graph 체커는 URL를 입력해 URL의 og:title, og:description, og:image 등 공유 메타데이터를 확인하는 서버 기반 유틸리티입니다.
  Sources: HTTP Semantics; The robots.txt file format; Sitemaps XML protocol; The Open Graph protocol; WHOIS Protocol Specification; The Transport Layer Security (TLS) Protocol Version 1.3
- [페이지 속도 간단 진단 — 서버 진단 도구](https://utillica.com/ko/page-speed-checker): 페이지 속도 간단 진단는 URL를 입력해 HTML 응답 시간, 크기, 캐시 헤더 등 기본 성능 신호를 확인하는 서버 기반 유틸리티입니다.
  Sources: HTTP Semantics; The robots.txt file format; Sitemaps XML protocol; The Open Graph protocol; WHOIS Protocol Specification; The Transport Layer Security (TLS) Protocol Version 1.3
- [DNSBL Check — 네트워크·이메일 보안 진단](https://utillica.com/ko/dnsbl-check): DNSBL Check는 IP 또는 도메인를 서버에서 조회해 IP/도메인의 소수 DNSBL/RBL 목록 조회 결과를 확인하는 도구입니다.
  Sources: HTTP Semantics; The robots.txt file format; Sitemaps XML protocol; The Open Graph protocol; WHOIS Protocol Specification; The Transport Layer Security (TLS) Protocol Version 1.3
- [SPF Checker — 네트워크·이메일 보안 진단](https://utillica.com/ko/spf-checker): SPF Checker는 도메인를 서버에서 조회해 SPF TXT record 존재와 기본 warning을 확인하는 도구입니다.
  Sources: HTTP Semantics; The robots.txt file format; Sitemaps XML protocol; The Open Graph protocol; WHOIS Protocol Specification; The Transport Layer Security (TLS) Protocol Version 1.3
- [DKIM Checker — 네트워크·이메일 보안 진단](https://utillica.com/ko/dkim-checker): DKIM Checker는 도메인 selector를 서버에서 조회해 selector._domainkey DKIM TXT record를 조회하는 도구입니다.
  Sources: HTTP Semantics; The robots.txt file format; Sitemaps XML protocol; The Open Graph protocol; WHOIS Protocol Specification; The Transport Layer Security (TLS) Protocol Version 1.3
- [DMARC Checker — 네트워크·이메일 보안 진단](https://utillica.com/ko/dmarc-checker): DMARC Checker는 도메인를 서버에서 조회해 _dmarc TXT record와 policy를 확인하는 도구입니다.
  Sources: HTTP Semantics; The robots.txt file format; Sitemaps XML protocol; The Open Graph protocol; WHOIS Protocol Specification; The Transport Layer Security (TLS) Protocol Version 1.3
- [Redirect Checker — 네트워크·이메일 보안 진단](https://utillica.com/ko/redirect-checker): Redirect Checker는 URL를 서버에서 조회해 URL 리다이렉트 chain과 최종 상태를 확인하는 도구입니다.
  Sources: HTTP Semantics; The robots.txt file format; Sitemaps XML protocol; The Open Graph protocol; WHOIS Protocol Specification; The Transport Layer Security (TLS) Protocol Version 1.3
- [URL Unshortener — 네트워크·이메일 보안 진단](https://utillica.com/ko/url-unshortener): URL Unshortener는 Short URL를 서버에서 조회해 short URL의 리다이렉트 chain을 확장하는 도구입니다.
  Sources: HTTP Semantics; The robots.txt file format; Sitemaps XML protocol; The Open Graph protocol; WHOIS Protocol Specification; The Transport Layer Security (TLS) Protocol Version 1.3
- [Security Headers Checker — 네트워크·이메일 보안 진단](https://utillica.com/ko/security-headers-checker): Security Headers Checker는 URL를 서버에서 조회해 HSTS, CSP, X-Frame-Options 등 HTTP 보안 헤더를 확인하는 도구입니다.
  Sources: HTTP Semantics; The robots.txt file format; Sitemaps XML protocol; The Open Graph protocol; WHOIS Protocol Specification; The Transport Layer Security (TLS) Protocol Version 1.3
- [TLS Certificate Checker — 네트워크·이메일 보안 진단](https://utillica.com/ko/tls-certificate-checker): TLS Certificate Checker는 도메인를 서버에서 조회해 TLS 인증서 주체, 발급자, 만료 정보를 확인하는 도구입니다.
  Sources: HTTP Semantics; The robots.txt file format; Sitemaps XML protocol; The Open Graph protocol; WHOIS Protocol Specification; The Transport Layer Security (TLS) Protocol Version 1.3

## 추첨·랜덤

Category hub: https://utillica.com/ko/category/random

- [비밀번호 생성기 — 안전한 랜덤 암호](https://utillica.com/ko/password-generator): 비밀번호 생성기는 길이와 문자 종류, 제외 규칙을 선택해 암호학적으로 안전한 무작위 비밀번호 또는 패스프레이즈를 만드는 도구입니다.
  Sources: Crypto.getRandomValues()
- [랜덤 숫자 생성기 — 브라우저 랜덤 도구](https://utillica.com/ko/random-number): 랜덤 숫자 생성기는 브라우저의 난수 기능으로 지정한 범위 안의 정수를 무작위로 생성하는 도구입니다.
  Sources: ECMAScript Language Specification
- [패스프레이즈 생성기 — 브라우저 랜덤 도구](https://utillica.com/ko/passphrase-generator): 패스프레이즈 생성기는 브라우저의 난수 기능으로 여러 단어를 조합한 기억하기 쉬운 암호 문구를 생성하는 도구입니다.
  Sources: ECMAScript Language Specification
- [랜덤 문자열 생성기 — 브라우저 랜덤 도구](https://utillica.com/ko/random-string): 랜덤 문자열 생성기는 브라우저의 난수 기능으로 지정한 길이의 무작위 문자열을 생성하는 도구입니다.
  Sources: ECMAScript Language Specification
- [랜덤 이름 생성기 — 브라우저 랜덤 도구](https://utillica.com/ko/random-name): 랜덤 이름 생성기는 브라우저의 난수 기능으로 테스트용 이름을 무작위로 조합하는 도구입니다.
  Sources: ECMAScript Language Specification
- [랜덤 닉네임 생성기 — 브라우저 랜덤 도구](https://utillica.com/ko/random-nickname): 랜덤 닉네임 생성기는 브라우저의 난수 기능으로 형용사와 명사를 조합한 닉네임을 생성하는 도구입니다.
  Sources: ECMAScript Language Specification
- [랜덤 팀 나누기 — 브라우저 랜덤 도구](https://utillica.com/ko/team-randomizer): 랜덤 팀 나누기는 브라우저의 난수 기능으로 입력한 이름 목록을 지정한 팀 수로 무작위 배정하는 도구입니다.
  Sources: ECMAScript Language Specification
- [룰렛 추첨기 — 브라우저 랜덤 도구](https://utillica.com/ko/roulette): 룰렛 추첨기는 브라우저의 난수 기능으로 입력한 후보 중 하나를 무작위로 선택하는 도구입니다.
  Sources: ECMAScript Language Specification
- [제비뽑기 — 브라우저 랜덤 도구](https://utillica.com/ko/draw-lots): 제비뽑기는 브라우저의 난수 기능으로 입력한 후보 목록의 추첨 순서를 무작위로 섞는 도구입니다.
  Sources: ECMAScript Language Specification
- [ULID 생성기 — 브라우저 랜덤 도구](https://utillica.com/ko/ulid-generator): ULID 생성기는 브라우저의 난수 기능으로 시간 정렬 가능한 ULID 문자열을 생성하는 도구입니다.
  Sources: ECMAScript Language Specification
- [Nano ID 생성기 — 브라우저 랜덤 도구](https://utillica.com/ko/nanoid-generator): Nano ID 생성기는 브라우저의 난수 기능으로 짧은 URL 친화 고유 ID를 생성하는 도구입니다.
  Sources: ECMAScript Language Specification
- [동전 던지기 — 브라우저 랜덤 도구](https://utillica.com/ko/coin-flip): 동전 던지기는 브라우저의 난수 기능으로 앞면 또는 뒷면을 무작위로 선택하는 도구입니다.
  Sources: ECMAScript Language Specification
- [주사위 굴리기 — 브라우저 랜덤 도구](https://utillica.com/ko/dice-roller): 주사위 굴리기는 브라우저의 난수 기능으로 1부터 6까지 주사위 값을 무작위로 생성하는 도구입니다.
  Sources: ECMAScript Language Specification
- [더미 개인정보 생성기 — 브라우저 랜덤 도구](https://utillica.com/ko/dummy-person-generator): 더미 개인정보 생성기는 브라우저의 난수 기능으로 테스트용 가짜 이름, 이메일, 전화번호, 주소를 생성하는 도구입니다.
  Sources: ECMAScript Language Specification
- [더미 JSON 생성기 — 브라우저 랜덤 도구](https://utillica.com/ko/dummy-json): 더미 JSON 생성기는 브라우저의 난수 기능으로 테스트용 JSON 객체 배열을 생성하는 도구입니다.
  Sources: ECMAScript Language Specification
- [대진표 생성기 — 랜덤 생성기](https://utillica.com/ko/tournament-bracket): 대진표 생성기는 명단으로 대진표를 생성하는 도구입니다.
  Sources: ECMAScript Language Specification
- [자리배치 생성기 — 랜덤 생성기](https://utillica.com/ko/seat-assignment): 자리배치 생성기는 교실 좌석을 무작위 배치하는 도구입니다.
  Sources: ECMAScript Language Specification
- [버스 좌석 배치 — 랜덤 생성기](https://utillica.com/ko/bus-seat-assignment): 버스 좌석 배치는 버스 좌석을 무작위 배치하는 도구입니다.
  Sources: ECMAScript Language Specification
- [가위바위보 — 랜덤 생성기](https://utillica.com/ko/rock-paper-scissors): 가위바위보는 가위바위보 결과를 생성하는 도구입니다.
  Sources: ECMAScript Language Specification
- [포춘쿠키 — 랜덤 생성기](https://utillica.com/ko/fortune-cookie): 포춘쿠키는 짧은 포춘 문구를 생성하는 도구입니다.
  Sources: ECMAScript Language Specification
- [로또 번호 생성기(고정수·제외수) — 브라우저 생활 도구](https://utillica.com/ko/lotto-number-generator): 로또 번호 생성기(고정수·제외수)는 1~45 범위에서 고정수와 제외수를 반영해 로또 번호 조합을 생성하는 도구 브라우저 기반 생활 보조 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [이름 이니셜·닉네임 조합기 — 브라우저 생활 도구](https://utillica.com/ko/nickname-initial-combiner): 이름 이니셜·닉네임 조합기는 이름이나 이니셜을 기반으로 닉네임 후보를 조합하는 도구 브라우저 기반 생활 보조 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [사랑 궁합 테스트 (Love Calculator) — 이름 두 개로 궁합 점수](https://utillica.com/ko/love-calculator): 사랑 궁합 테스트는 두 이름을 해시 함수(FNV-1a)로 계산해 0~100% 점수와 재미 코멘트를 보여주는 오락용 도구로, 과학적 근거는 없습니다.
  Sources: The FNV Non-Cryptographic Hash Algorithm (IETF draft); MDN Web Docs: Client-side web APIs
- [이름 궁합 테스트 — 한글 획수 계산 (전통 방식)](https://utillica.com/ko/name-compatibility): 이름 궁합 테스트는 두 한글 이름의 글자 획수를 번갈아 나열한 뒤 이웃한 숫자의 합에서 일의 자리만 남기는 계산을 반복해 마지막 두 자리를 점수로 읽는 전통 놀이 방식의 오락용 도구로, 과학적 근거는 없습니다.
  Sources: The Unicode Standard — Hangul Syllables (U+AC00-U+D7AF); MDN Web Docs: Client-side web APIs

## 개발자 도구

Category hub: https://utillica.com/ko/category/developer

- [UUID 생성기 — 브라우저 랜덤 도구](https://utillica.com/ko/uuid-generator): UUID 생성기는 브라우저의 난수 기능으로 RFC 4122 형식의 UUID를 생성하는 도구입니다.
  Sources: ECMAScript Language Specification
- [법인등록번호·주민번호 형식 검증기 — 브라우저 생활 도구](https://utillica.com/ko/korean-id-format-validator): 법인등록번호·주민번호 형식 검증기는 법인등록번호와 주민등록번호의 입력 형식을 브라우저에서 검증하는 도구 브라우저 기반 생활 보조 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [QR 코드 생성기 — 텍스트·URL을 QR로](https://utillica.com/ko/qr-generator): QR 코드 생성기는 텍스트·URL·Wi-Fi·이메일·전화번호 값을 스캔 가능한 QR 코드 이미지로 브라우저에서 생성하는 도구입니다.
  Sources: ISO/IEC 18004:2015 QR Code symbology
- [바코드 생성기 — Code 39 SVG](https://utillica.com/ko/barcode-generator): 바코드 생성기는 입력한 코드 값을 브라우저에서 스캔 가능한 Code 39 SVG 바코드로 만드는 도구입니다.
  Sources: ISO/IEC 16388:2007 Code 39 bar code symbology
- [Code to Image — 개발자 공유 이미지](https://utillica.com/ko/code-to-image): Code to Image는 코드 스니펫을 canvas PNG 이미지로 만드는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [JSON to CSV 변환기 — 브라우저 데이터 포맷 도구](https://utillica.com/ko/json-to-csv): JSON to CSV 변환기는 JSON 입력을 파싱해 공통 데이터 구조로 정규화한 뒤 CSV 문자열로 직렬화하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; YAML 1.2.2 Specification; TOML v1.0.0; Extensible Markup Language (XML) 1.0; RFC 4180: Common Format and MIME Type for CSV Files
- [CSV to JSON 변환기 — 브라우저 데이터 포맷 도구](https://utillica.com/ko/csv-to-json): CSV to JSON 변환기는 CSV 입력을 파싱해 공통 데이터 구조로 정규화한 뒤 JSON 문자열로 직렬화하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; YAML 1.2.2 Specification; TOML v1.0.0; Extensible Markup Language (XML) 1.0; RFC 4180: Common Format and MIME Type for CSV Files
- [JSON to YAML 변환기 — 브라우저 데이터 포맷 도구](https://utillica.com/ko/json-to-yaml): JSON to YAML 변환기는 JSON 입력을 파싱해 공통 데이터 구조로 정규화한 뒤 YAML 문자열로 직렬화하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; YAML 1.2.2 Specification; TOML v1.0.0; Extensible Markup Language (XML) 1.0; RFC 4180: Common Format and MIME Type for CSV Files
- [YAML to JSON 변환기 — 브라우저 데이터 포맷 도구](https://utillica.com/ko/yaml-to-json): YAML to JSON 변환기는 YAML 입력을 파싱해 공통 데이터 구조로 정규화한 뒤 JSON 문자열로 직렬화하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; YAML 1.2.2 Specification; TOML v1.0.0; Extensible Markup Language (XML) 1.0; RFC 4180: Common Format and MIME Type for CSV Files
- [JSON to TOML 변환기 — 브라우저 데이터 포맷 도구](https://utillica.com/ko/json-to-toml): JSON to TOML 변환기는 JSON 입력을 파싱해 공통 데이터 구조로 정규화한 뒤 TOML 문자열로 직렬화하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; YAML 1.2.2 Specification; TOML v1.0.0; Extensible Markup Language (XML) 1.0; RFC 4180: Common Format and MIME Type for CSV Files
- [TOML to JSON 변환기 — 브라우저 데이터 포맷 도구](https://utillica.com/ko/toml-to-json): TOML to JSON 변환기는 TOML 입력을 파싱해 공통 데이터 구조로 정규화한 뒤 JSON 문자열로 직렬화하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; YAML 1.2.2 Specification; TOML v1.0.0; Extensible Markup Language (XML) 1.0; RFC 4180: Common Format and MIME Type for CSV Files
- [JSON to XML 변환기 — 브라우저 데이터 포맷 도구](https://utillica.com/ko/json-to-xml): JSON to XML 변환기는 JSON 입력을 파싱해 공통 데이터 구조로 정규화한 뒤 XML 문자열로 직렬화하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; YAML 1.2.2 Specification; TOML v1.0.0; Extensible Markup Language (XML) 1.0; RFC 4180: Common Format and MIME Type for CSV Files
- [XML to JSON 변환기 — 브라우저 데이터 포맷 도구](https://utillica.com/ko/xml-to-json): XML to JSON 변환기는 XML 입력을 파싱해 공통 데이터 구조로 정규화한 뒤 JSON 문자열로 직렬화하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; YAML 1.2.2 Specification; TOML v1.0.0; Extensible Markup Language (XML) 1.0; RFC 4180: Common Format and MIME Type for CSV Files
- [YAML to TOML 변환기 — 브라우저 데이터 포맷 도구](https://utillica.com/ko/yaml-to-toml): YAML to TOML 변환기는 YAML 입력을 파싱해 공통 데이터 구조로 정규화한 뒤 TOML 문자열로 직렬화하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; YAML 1.2.2 Specification; TOML v1.0.0; Extensible Markup Language (XML) 1.0; RFC 4180: Common Format and MIME Type for CSV Files
- [TOML to YAML 변환기 — 브라우저 데이터 포맷 도구](https://utillica.com/ko/toml-to-yaml): TOML to YAML 변환기는 TOML 입력을 파싱해 공통 데이터 구조로 정규화한 뒤 YAML 문자열로 직렬화하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; YAML 1.2.2 Specification; TOML v1.0.0; Extensible Markup Language (XML) 1.0; RFC 4180: Common Format and MIME Type for CSV Files
- [CSV to YAML 변환기 — 브라우저 데이터 포맷 도구](https://utillica.com/ko/csv-to-yaml): CSV to YAML 변환기는 CSV 입력을 파싱해 공통 데이터 구조로 정규화한 뒤 YAML 문자열로 직렬화하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; YAML 1.2.2 Specification; TOML v1.0.0; Extensible Markup Language (XML) 1.0; RFC 4180: Common Format and MIME Type for CSV Files
- [YAML to CSV 변환기 — 브라우저 데이터 포맷 도구](https://utillica.com/ko/yaml-to-csv): YAML to CSV 변환기는 YAML 입력을 파싱해 공통 데이터 구조로 정규화한 뒤 CSV 문자열로 직렬화하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; YAML 1.2.2 Specification; TOML v1.0.0; Extensible Markup Language (XML) 1.0; RFC 4180: Common Format and MIME Type for CSV Files
- [CSV to TSV 변환기 — 브라우저 데이터 포맷 도구](https://utillica.com/ko/csv-to-tsv): CSV to TSV 변환기는 CSV 입력을 파싱해 공통 데이터 구조로 정규화한 뒤 TSV 문자열로 직렬화하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; YAML 1.2.2 Specification; TOML v1.0.0; Extensible Markup Language (XML) 1.0; RFC 4180: Common Format and MIME Type for CSV Files
- [TSV to CSV 변환기 — 브라우저 데이터 포맷 도구](https://utillica.com/ko/tsv-to-csv): TSV to CSV 변환기는 TSV 입력을 파싱해 공통 데이터 구조로 정규화한 뒤 CSV 문자열로 직렬화하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; YAML 1.2.2 Specification; TOML v1.0.0; Extensible Markup Language (XML) 1.0; RFC 4180: Common Format and MIME Type for CSV Files
- [XML to YAML 변환기 — 브라우저 데이터 포맷 도구](https://utillica.com/ko/xml-to-yaml): XML to YAML 변환기는 XML 입력을 파싱해 공통 데이터 구조로 정규화한 뒤 YAML 문자열로 직렬화하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; YAML 1.2.2 Specification; TOML v1.0.0; Extensible Markup Language (XML) 1.0; RFC 4180: Common Format and MIME Type for CSV Files
- [YAML to XML 변환기 — 브라우저 데이터 포맷 도구](https://utillica.com/ko/yaml-to-xml): YAML to XML 변환기는 YAML 입력을 파싱해 공통 데이터 구조로 정규화한 뒤 XML 문자열로 직렬화하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; YAML 1.2.2 Specification; TOML v1.0.0; Extensible Markup Language (XML) 1.0; RFC 4180: Common Format and MIME Type for CSV Files
- [JSON to TypeScript 생성기 — 브라우저 타입 도구](https://utillica.com/ko/json-to-typescript): JSON to TypeScript 생성기는 JSON 샘플의 객체, 배열, null, 숫자, 문자열 구조를 추론해 TypeScript 코드를 만드는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; JSON; JSON Schema Draft 2020-12; TypeScript Handbook
- [JSON to Zod 생성기 — 브라우저 타입 도구](https://utillica.com/ko/json-to-zod): JSON to Zod 생성기는 JSON 샘플의 객체, 배열, null, 숫자, 문자열 구조를 추론해 Zod 코드를 만드는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; JSON; JSON Schema Draft 2020-12; TypeScript Handbook
- [JSON to JSON Schema 생성기 — 브라우저 타입 도구](https://utillica.com/ko/json-to-json-schema): JSON to JSON Schema 생성기는 JSON 샘플의 객체, 배열, null, 숫자, 문자열 구조를 추론해 JSON Schema 코드를 만드는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; JSON; JSON Schema Draft 2020-12; TypeScript Handbook
- [JSON to GraphQL 생성기 — 브라우저 타입 도구](https://utillica.com/ko/json-to-graphql): JSON to GraphQL 생성기는 JSON 샘플의 객체, 배열, null, 숫자, 문자열 구조를 추론해 GraphQL 코드를 만드는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; JSON; JSON Schema Draft 2020-12; TypeScript Handbook
- [JSON to Go 생성기 — 브라우저 타입 도구](https://utillica.com/ko/json-to-go): JSON to Go 생성기는 JSON 샘플의 객체, 배열, null, 숫자, 문자열 구조를 추론해 Go 코드를 만드는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; JSON; JSON Schema Draft 2020-12; TypeScript Handbook
- [JSON to Rust 생성기 — 브라우저 타입 도구](https://utillica.com/ko/json-to-rust): JSON to Rust 생성기는 JSON 샘플의 객체, 배열, null, 숫자, 문자열 구조를 추론해 Rust 코드를 만드는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; JSON; JSON Schema Draft 2020-12; TypeScript Handbook
- [JSON 포맷터·검증 — 브라우저 개발자 도구](https://utillica.com/ko/json-formatter): JSON 포맷터·검증는 JSON을 파싱해 정렬하거나 압축하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Base64 인코드·디코드 — 브라우저 개발자 도구](https://utillica.com/ko/base64): Base64 인코드·디코드는 텍스트를 Base64로 인코딩하거나 디코딩하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [URL 인코드·디코드 — 브라우저 개발자 도구](https://utillica.com/ko/url-encode): URL 인코드·디코드는 URL 예약 문자를 퍼센트 인코딩하거나 복원하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [HTML 엔티티 변환 — 브라우저 개발자 도구](https://utillica.com/ko/html-entities): HTML 엔티티 변환는 HTML 특수문자를 엔티티로 escape하거나 복원하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [JWT 디코더 — 브라우저 개발자 도구](https://utillica.com/ko/jwt-decoder): JWT 디코더는 JWT 헤더와 페이로드를 서명 검증 없이 디코딩하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [해시 생성기 — 브라우저 개발자 도구](https://utillica.com/ko/hash-generator): 해시 생성기는 텍스트의 SHA-256 또는 SHA-1 해시를 생성하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [HMAC 생성기 — 브라우저 개발자 도구](https://utillica.com/ko/hmac-generator): HMAC 생성기는 키와 메시지로 HMAC-SHA256 값을 생성하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Regex tester — 브라우저 개발자 도구](https://utillica.com/ko/regex-tester): Regex tester는 정규식과 테스트 문자열의 매칭 결과를 확인하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [SQL formatter — 브라우저 개발자 도구](https://utillica.com/ko/sql-formatter): SQL formatter는 SQL 키워드 기준으로 쿼리를 읽기 쉽게 줄바꿈하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [XML formatter — 브라우저 개발자 도구](https://utillica.com/ko/xml-formatter): XML formatter는 XML 태그 구조를 들여쓰기하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [HTML formatter — 브라우저 개발자 도구](https://utillica.com/ko/html-formatter): HTML formatter는 HTML 태그 구조를 들여쓰기하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [CSS minifier — 브라우저 개발자 도구](https://utillica.com/ko/css-minifier): CSS minifier는 CSS 주석과 불필요한 공백을 줄이는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [JS minifier — 브라우저 개발자 도구](https://utillica.com/ko/js-minifier): JS minifier는 JavaScript 주석과 불필요한 공백을 줄이는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Markdown preview — 브라우저 개발자 도구](https://utillica.com/ko/markdown-preview): Markdown preview는 Markdown 텍스트를 간단한 HTML 미리보기 문자열로 변환하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [문자열 escape/unescape — 브라우저 개발자 도구](https://utillica.com/ko/escape-string): 문자열 escape/unescape는 문자열의 제어문자를 escape하거나 복원하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Regex escape — 브라우저 개발자 도구](https://utillica.com/ko/regex-escape): Regex escape는 정규식 특수문자를 리터럴 검색용으로 escape하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Cron parser — 브라우저 개발자 도구](https://utillica.com/ko/cron-parser): Cron parser는 5필드 cron 표현식을 사람이 읽는 설명으로 해석하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Gitignore generator — 브라우저 개발자 도구](https://utillica.com/ko/gitignore-generator): Gitignore generator는 프로젝트 키워드에 맞는 .gitignore 템플릿을 생성하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Dockerignore generator — 브라우저 개발자 도구](https://utillica.com/ko/dockerignore-generator): Dockerignore generator는 Docker 빌드 컨텍스트에서 제외할 파일 템플릿을 생성하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [MIME type lookup — 브라우저 개발자 도구](https://utillica.com/ko/mime-type-lookup): MIME type lookup는 파일 확장자나 MIME type의 매핑을 조회하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [HTTP status code lookup — 브라우저 개발자 도구](https://utillica.com/ko/http-status-lookup): HTTP status code lookup는 HTTP 상태 코드의 이름과 의미를 조회하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [User-Agent parser — 브라우저 개발자 도구](https://utillica.com/ko/user-agent-parser): User-Agent parser는 User-Agent 문자열에서 브라우저, OS, 기기를 추정하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [CIDR 계산기 — 브라우저 개발자 도구](https://utillica.com/ko/cidr-calculator): CIDR 계산기는 CIDR 표기에서 네트워크 범위와 호스트 수를 계산하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [IPv4 subnet 계산기 — 브라우저 개발자 도구](https://utillica.com/ko/subnet-calculator): IPv4 subnet 계산기는 IPv4 주소와 prefix로 subnet 정보를 계산하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [htpasswd 생성기 — 브라우저 개발자 도구](https://utillica.com/ko/htpasswd): htpasswd 생성기는 사용자명과 비밀번호로 Apache htpasswd {SHA} 라인을 생성하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Unix 타임스탬프 변환 — 브라우저 개발자 도구](https://utillica.com/ko/timestamp-converter): Unix 타임스탬프 변환는 Unix timestamp와 ISO 날짜를 상호 변환하는 브라우저 기반 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [진법 변환기 — 2진수·8진수·10진수·16진수 상호 변환](https://utillica.com/ko/number-base-converter): 진법 변환기는 2진수·8진수·10진수·16진수 등 2~36 사이 진법으로 표현된 정수를 다른 진법 표기로 바꿔 주는 개발자 도구입니다.
  Sources: Base; MDN Web Docs: Client-side web APIs
- [2진수 텍스트 변환기 — 텍스트를 binary·hex로](https://utillica.com/ko/binary-translator): 2진수 텍스트 변환기는 문자열을 UTF-8 바이트로 인코딩해 8비트 2진수(또는 16진수)로 표기하고, 그 반대로도 복원하는 개발자 도구입니다.
  Sources: RFC 3629: UTF-8, a transformation format of ISO 10646; MDN Web Docs: Client-side web APIs
- [2진수 계산기 — 덧셈·뺄셈·AND·OR·XOR·시프트](https://utillica.com/ko/binary-calculator): 2진수 계산기는 2진수로 입력한 두 정수의 덧셈·뺄셈·곱셈·나눗셈과 AND·OR·XOR·NOT·시프트 같은 비트 연산 결과를 계산하는 개발자 도구입니다.
  Sources: Base; MDN Web Docs: Client-side web APIs
- [ASCII 코드표 — 0~127 문자 코드 조회](https://utillica.com/ko/ascii-table): ASCII 코드표는 0~127 범위의 표준 문자 코드(제어 문자 33개와 출력 가능 문자 95개)를 10진수·16진수·8진수·2진수로 보여 주는 참조 도구입니다.
  Sources: RFC 20: ASCII format for network interchange; MDN Web Docs: Client-side web APIs
- [유니코드 분석기 — 코드포인트·UTF-8·UTF-16 바이트](https://utillica.com/ko/unicode-inspector): 유니코드 분석기는 입력 문자열을 코드포인트 단위로 분해해 각 문자의 U+ 코드, UTF-8 바이트, UTF-16 유닛, 이름(또는 블록)을 표시하는 개발자 도구입니다.
  Sources: The Unicode Standard; RFC 3629: UTF-8, a transformation format of ISO 10646; MDN Web Docs: Client-side web APIs
- [chmod 계산기 — 755·644 권한 변환](https://utillica.com/ko/chmod-calculator): chmod 계산기는 리눅스·유닉스 파일 권한을 rwx 체크박스, 8진수 표기(예: 755), 기호 표기(예: rwxr-xr-x) 사이에서 상호 변환하는 개발자 도구입니다.
  Sources: POSIX chmod utility; MDN Web Docs: Client-side web APIs
- [URL 파서 — 주소 분해·쿼리 파라미터 편집](https://utillica.com/ko/url-parser): URL 파서는 주소를 WHATWG URL 표준에 따라 프로토콜·호스트·포트·경로·쿼리·프래그먼트로 분해하고 쿼리 파라미터를 편집해 다시 조립하는 개발자 도구입니다.
  Sources: URL Living Standard; MDN Web Docs: Client-side web APIs
- [Punycode 변환기 — 한글 도메인 xn-- 변환](https://utillica.com/ko/punycode-converter): Punycode 변환기는 한글 같은 비ASCII 문자가 들어간 국제화 도메인(IDN)을 DNS가 처리할 수 있는 xn-- 접두사의 ASCII 표기(RFC 3492)로 상호 변환하는 도구입니다.
  Sources: RFC 3492: Punycode — A Bootstring encoding of Unicode for IDNA; RFC 5890: Internationalized Domain Names for Applications (IDNA); MDN Web Docs: Client-side web APIs
- [bcrypt 해시 생성기·검증기](https://utillica.com/ko/bcrypt-generator): bcrypt 해시 생성기는 비밀번호를 bcrypt 알고리즘(랜덤 salt + 조절 가능한 cost)으로 해시하고, 비밀번호와 해시의 일치 여부를 검증하는 개발자 도구입니다.
  Sources: A Future-Adaptable Password Scheme (bcrypt); OWASP Password Storage Cheat Sheet; MDN Web Docs: Client-side web APIs
- [포트 번호 조회 — 잘 알려진 포트 검색](https://utillica.com/ko/port-lookup): 포트 번호 조회는 SSH(22)·HTTP(80)·HTTPS(443)·MySQL(3306) 등 잘 알려진 TCP/UDP 포트와 서비스의 매핑을 검색하는 참조 도구입니다.
  Sources: Service Name and Transport Protocol Port Number Registry; RFC 6335: Service Name and Port Number Procedures; MDN Web Docs: Client-side web APIs
- [랜덤 MAC 주소 생성기](https://utillica.com/ko/mac-address-generator): 랜덤 MAC 주소 생성기는 48비트(6바이트) MAC 주소를 난수로 만들어 콜론·하이픈·점 형식으로 출력하는 개발자 도구로, 실제 장비와 충돌하지 않는 로컬 관리(locally administered) 주소 옵션을 제공합니다.
  Sources: RFC 7042: IEEE 802 Numbers and IETF Protocol and Documentation Usage; MDN Web Docs: Client-side web APIs
- [카드번호 검증기 — Luhn 체크·브랜드 판별](https://utillica.com/ko/card-validator): 카드번호 검증기는 카드번호의 Luhn 체크섬(ISO/IEC 7812)을 브라우저에서 검사하고 앞자리(IIN/BIN) 규칙으로 Visa·Mastercard 같은 브랜드를 판별하는 개발자 도구입니다.
  Sources: ISO/IEC 7812-1: Identification cards — Numbering system; MDN Web Docs: Client-side web APIs
- [메타 태그 생성기 — title·description·canonical·robots](https://utillica.com/ko/meta-tag-generator): 메타 태그 생성기는 페이지 제목·설명·canonical URL·robots 지시어를 입력하면 HTML head에 붙여넣을 완성된 메타 태그 스니펫을 만들어 주는 SEO 도구입니다.
  Sources: Meta tags and HTML attributes that Google supports; Control your snippets in search results
- [Open Graph 태그 생성기 — OG·Twitter Card 미리보기](https://utillica.com/ko/open-graph-generator): Open Graph 태그 생성기는 제목·설명·이미지 URL을 입력하면 SNS 공유 카드에 쓰이는 OG 태그와 Twitter Card 태그 세트를 만들어 주는 도구입니다.
  Sources: The Open Graph protocol; About X Cards
- [구글 SERP 미리보기 — 검색 결과 잘림 시뮬레이터](https://utillica.com/ko/serp-preview): SERP 미리보기는 페이지 title·URL·meta description이 구글 검색 결과(SERP)에서 어떻게 표시되는지 데스크톱·모바일 레이아웃과 픽셀 폭 기준 잘림으로 시뮬레이션하는 도구입니다.
  Sources: Influencing your title links in search results; Control your snippets in search results
- [robots.txt 생성기 — AI 크롤러(GPTBot) 차단 프리셋](https://utillica.com/ko/robots-txt-generator): robots.txt 생성기는 크롤링 허용 정책, Disallow 경로, 사이트맵 위치, AI 크롤러 허용/차단 선택을 조합해 사이트 루트에 올릴 robots.txt 파일을 만들어 주는 도구입니다.
  Sources: RFC 9309: Robots Exclusion Protocol; Introduction to robots.txt; OpenAI crawlers and bots
- [sitemap.xml 생성기 — URL 목록으로 사이트맵 만들기](https://utillica.com/ko/sitemap-xml-generator): sitemap.xml 생성기는 한 줄에 하나씩 붙여넣은 URL 목록을 Sitemaps 프로토콜 표준을 따르는 XML 사이트맵 파일로 변환하는 도구입니다.
  Sources: Sitemaps XML protocol; Build and submit a sitemap
- [.htaccess 리다이렉트 생성기 — 301·www·HTTPS 강제](https://utillica.com/ko/htaccess-redirect-generator): .htaccess 리다이렉트 생성기는 301/302 개별 리다이렉트와 www 통일·HTTPS 강제 규칙을 Apache .htaccess에 붙여넣을 스니펫으로 만들어 주는 도구입니다.
  Sources: Apache mod_alias: Redirect directive; Apache mod_rewrite documentation
- [hreflang 태그 생성기 — 다국어 링크 세트(x-default 포함)](https://utillica.com/ko/hreflang-generator): hreflang 생성기는 언어 코드와 URL 쌍 목록을 입력하면 다국어 페이지 간 관계를 선언하는 <link rel="alternate" hreflang> 태그 세트를 x-default까지 포함해 만들어 주는 도구입니다.
  Sources: Localized versions of your pages (hreflang); BCP 47: Tags for Identifying Languages (RFC 5646)
- [HTML → Markdown 변환기 — 브라우저에서 즉시 변환](https://utillica.com/ko/html-to-markdown): HTML → Markdown 변환기는 붙여넣은 HTML 코드를 Turndown 라이브러리로 제목·목록·링크·코드 같은 Markdown 문법으로 바꿔 주는 브라우저 도구입니다.
  Sources: CommonMark Spec; Turndown: HTML to Markdown converter
- [Markdown → HTML 변환기 — 코드 붙여넣기용 HTML 생성](https://utillica.com/ko/markdown-to-html): Markdown → HTML 변환기는 붙여넣은 Markdown 텍스트를 블로그·이메일·웹페이지에 붙여넣을 수 있는 HTML 코드로 바꿔 주는 브라우저 도구입니다.
  Sources: CommonMark Spec; Turndown: HTML to Markdown converter
- [QR 코드 리더 — 이미지 업로드로 QR 스캔](https://utillica.com/ko/qr-scanner): QR 코드 리더는 QR 코드가 담긴 이미지 파일을 업로드하거나 붙여넣으면 jsQR 라이브러리로 브라우저에서 내용을 해독하는 도구입니다.
  Sources: ISO/IEC 18004:2015 QR Code symbology; jsQR: QR code reading library
- [CSR 생성기(브라우저) — RSA 개인키와 인증서 요청 PEM](https://utillica.com/ko/csr-generator-browser): CSR 생성기(브라우저)는 도메인 주체 정보와 SAN 목록을 ASN.1 PKCS#10 구조로 인코딩하고 Web Crypto API로 서명해 인증서 요청 PEM을 만드는 개발자 보안 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; MDN Web Docs: Web Crypto API; RFC 2986: PKCS #10 Certification Request Syntax; RFC 5280: Internet X.509 Public Key Infrastructure Certificate and CRL Profile
- [SSH 키 생성기(ed25519) — 브라우저 OpenSSH 키페어](https://utillica.com/ko/ssh-ed25519-key-generator): SSH 키 생성기(ed25519)는 Web Crypto API로 Ed25519 키쌍을 만들고 OpenSSH 공개키와 개인키 형식으로 인코딩하는 브라우저 개발자 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; MDN Web Docs: Web Crypto API; RFC 8709: Ed25519 and Ed448 Public Key Algorithms for SSH
- [WireGuard 키페어 생성기 — 브라우저 X25519 키](https://utillica.com/ko/wireguard-keypair-generator): WireGuard 키페어 생성기는 브라우저 Web Crypto API의 X25519 키쌍을 WireGuard에서 쓰는 base64 private/public key 문자열로 변환하는 개발자 보안 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; MDN Web Docs: Web Crypto API; WireGuard: Quick Start
- [사업자등록번호 검증기 — 10자리 체크섬 형식 확인](https://utillica.com/ko/business-registration-validator): 사업자등록번호 검증기는 국내 사업자등록번호 10자리의 숫자 형식과 체크섬 일치 여부를 확인하는 브라우저 기반 개발자 도구입니다.
  Sources: National Tax Service Hometax business registration status service; MDN Web Docs: Client-side web APIs
- [JWT 서명기 — 브라우저 HS256 토큰 생성](https://utillica.com/ko/jwt-signer): JWT 서명기는 header와 payload JSON을 base64url로 인코딩하고 secret으로 HMAC-SHA256 서명을 붙여 HS256 JSON Web Token을 만드는 브라우저 개발자 도구입니다.
  Sources: RFC 7519: JSON Web Token (JWT); RFC 7515: JSON Web Signature (JWS); Web Crypto API: SubtleCrypto.sign(); MDN Web Docs: Client-side web APIs
- [SPF 레코드 생성기 — 이메일 발신 허용 TXT 만들기](https://utillica.com/ko/spf-record-generator): SPF 레코드 생성기는 어떤 메일 서버가 도메인을 대신해 발신할 수 있는지 선언하는 v=spf1 TXT 값을 폼 입력으로 만드는 이메일 인증 도구입니다.
  Sources: RFC 7208: Sender Policy Framework (SPF); DNS TXT resource records; MDN Web Docs: Client-side web APIs
- [DKIM 레코드 생성기 — selector._domainkey TXT 만들기](https://utillica.com/ko/dkim-record-generator): DKIM 레코드 생성기는 메일 서비스가 제공한 공개키를 selector._domainkey host에 게시할 수 있도록 v=DKIM1 TXT 값을 정리해 주는 이메일 인증 도구입니다.
  Sources: RFC 6376: DomainKeys Identified Mail (DKIM); DNS TXT resource records; MDN Web Docs: Client-side web APIs
- [DMARC 레코드 생성기 — p=none/quarantine/reject 정책 만들기](https://utillica.com/ko/dmarc-record-generator): DMARC 레코드 생성기는 SPF와 DKIM 결과를 도메인 정책으로 연결하는 _dmarc TXT 값을 폼 입력으로 만들어 주는 이메일 인증 정책 도구입니다.
  Sources: RFC 7489: Domain-based Message Authentication, Reporting, and Conformance (DMARC); RFC 7208: Sender Policy Framework (SPF); RFC 6376: DomainKeys Identified Mail (DKIM); MDN Web Docs: Client-side web APIs
- [.env ↔ JSON/YAML 변환기 — 브라우저 개발자 도구](https://utillica.com/ko/env-json-yaml-converter): .env ↔ JSON/YAML 변환기는 .env 설정을 JSON 또는 YAML로 바꾸거나 JSON 객체를 .env 형식으로 되돌리는 도구 브라우저 기반 개발자 워크플로우 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [JSON 구조 diff — 브라우저 개발자 도구](https://utillica.com/ko/json-structure-diff): JSON 구조 diff는 두 JSON의 키 구조와 타입 차이를 비교하는 도구 브라우저 기반 개발자 워크플로우 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [HTTP 요청 빌더 — 브라우저 개발자 도구](https://utillica.com/ko/http-request-builder): HTTP 요청 빌더는 간단한 요청 명세를 curl, fetch, httpie 명령으로 바꾸는 도구 브라우저 기반 개발자 워크플로우 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [BIND 존파일 생성기 — 브라우저 개발자 도구](https://utillica.com/ko/bind-zonefile-generator): BIND 존파일 생성기는 도메인·IP·메일 서버 입력으로 기본 DNS zone 파일을 생성하는 도구 브라우저 기반 개발자 워크플로우 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; RFC 1035: Domain Names - Implementation and Specification
- [UUID v7/ULID 시간 디코더 — 브라우저 개발자 도구](https://utillica.com/ko/uuid-ulid-time-decoder): UUID v7/ULID 시간 디코더는 UUID v7 또는 ULID 문자열에서 생성 시각을 추출하는 도구 브라우저 기반 개발자 워크플로우 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Webhook 페이로드 목업 생성기 — 브라우저 개발자 도구](https://utillica.com/ko/webhook-payload-mock): Webhook 페이로드 목업 생성기는 GitHub·Stripe·Slack 예시 이벤트 JSON을 빠르게 생성하는 도구 브라우저 기반 개발자 워크플로우 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [정규식 패턴 라이브러리 — 브라우저 개발자 도구](https://utillica.com/ko/regex-pattern-library): 정규식 패턴 라이브러리는 자주 쓰는 검증 정규식과 입력 텍스트의 매칭 결과를 함께 보여 주는 도구 브라우저 기반 개발자 워크플로우 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [CORS 설정 생성기 — 브라우저 개발자 도구](https://utillica.com/ko/cors-config-generator): CORS 설정 생성기는 요청 시나리오에서 필요한 CORS 응답 헤더 예시를 생성하는 도구 브라우저 기반 개발자 워크플로우 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; MDN Web Docs: Cross-Origin Resource Sharing (CORS)
- [docker run → compose 변환기 — 브라우저 DevOps 도구](https://utillica.com/ko/docker-run-to-compose): docker run → compose 변환기는 단일 docker run 명령을 Compose service 초안으로 변환하는 도구 브라우저 기반 DevOps 보조 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification; Docker Docs: Compose file reference
- [crontab ↔ systemd timer 변환기 — 브라우저 DevOps 도구](https://utillica.com/ko/crontab-systemd-timer): crontab ↔ systemd timer 변환기는 단일 cron 줄과 기본 systemd OnCalendar timer를 상호 변환하는 도구 브라우저 기반 DevOps 보조 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification; systemd.timer manual
- [CSP 빌더·분석기 — 브라우저 DevOps 도구](https://utillica.com/ko/csp-builder): CSP 빌더·분석기는 Content-Security-Policy 헤더 초안과 검토 메모를 생성하는 도구 브라우저 기반 DevOps 보조 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification; MDN Web Docs: Content-Security-Policy
- [curl → 코드 변환기 — 브라우저 DevOps 도구](https://utillica.com/ko/curl-to-code): curl → 코드 변환기는 curl 명령을 fetch, Axios, Python requests 코드 초안으로 변환하는 도구 브라우저 기반 DevOps 보조 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification; curl manual
- [정규식 설명기 — 브라우저 DevOps 도구](https://utillica.com/ko/regex-explainer): 정규식 설명기는 JavaScript 정규식을 토큰별 설명 초안으로 풀어 주는 도구 브라우저 기반 DevOps 보조 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification; MDN Web Docs: Regular expressions
- [TOTP 시크릿·QR 생성기 — 브라우저 DevOps 도구](https://utillica.com/ko/totp-secret-generator): TOTP 시크릿·QR 생성기는 TOTP base32 secret, otpauth URI, QR 코드를 브라우저에서 생성하는 도구 브라우저 기반 DevOps 보조 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification; RFC 6238: Time-Based One-Time Password Algorithm
- [한국형 더미 데이터 생성기 — 브라우저 개발 보조 도구](https://utillica.com/ko/korean-dummy-data-generator): 한국형 더미 데이터 생성기는 테스트용 한국 이름, 예시 이메일, 예약된 전화번호, 가상 주소 데이터를 생성하는 도구 브라우저 기반 개발 보조 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [AI 답변 검증 모드 — 브라우저 개발 보조 도구](https://utillica.com/ko/ai-answer-verifier): AI 답변 검증 모드는 AI가 낸 숫자·JSON·텍스트 답변을 기대값과 로컬에서 비교하는 도구 브라우저 기반 개발 보조 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [위젯용 결과 배지 생성기 — 브라우저 개발 보조 도구](https://utillica.com/ko/widget-result-badge-generator): 위젯용 결과 배지 생성기는 결과값을 문서와 외부 위젯에 붙일 수 있는 SVG·Markdown·HTML 배지로 만드는 도구 브라우저 기반 개발 보조 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification; MDN Web Docs: SVG

## 텍스트

Category hub: https://utillica.com/ko/category/text

- [글자수 세기 — 글자·단어·바이트](https://utillica.com/ko/word-counter): 글자수 세기는 텍스트의 글자·단어·줄·공백 제외 글자·바이트 수를 실시간으로 집계하는 도구입니다.
  Sources: TextEncoder
- [대소문자 변환기 — 브라우저 텍스트 처리](https://utillica.com/ko/case-converter): 대소문자 변환기는 입력 텍스트를 브라우저에서 처리해 대문자, 소문자, 제목형 대소문자로 변환하는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [개발자 케이스 변환기 — 브라우저 텍스트 처리](https://utillica.com/ko/dev-case): 개발자 케이스 변환기는 입력 텍스트를 브라우저에서 처리해 camelCase, PascalCase, kebab-case, snake_case로 변환하는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [중복 줄 제거 — 브라우저 텍스트 처리](https://utillica.com/ko/remove-duplicate-lines): 중복 줄 제거는 입력 텍스트를 브라우저에서 처리해 반복되는 줄을 한 번만 남기는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [줄 정렬 — 브라우저 텍스트 처리](https://utillica.com/ko/sort-lines): 줄 정렬는 입력 텍스트를 브라우저에서 처리해 여러 줄을 오름차순 또는 내림차순으로 정렬하는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [줄 번호 붙이기 — 브라우저 텍스트 처리](https://utillica.com/ko/add-line-numbers): 줄 번호 붙이기는 입력 텍스트를 브라우저에서 처리해 각 줄 앞에 순번을 붙이는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [줄바꿈 제거 — 브라우저 텍스트 처리](https://utillica.com/ko/remove-line-breaks): 줄바꿈 제거는 입력 텍스트를 브라우저에서 처리해 줄바꿈을 공백으로 바꾸는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [공백 정리 — 브라우저 텍스트 처리](https://utillica.com/ko/remove-whitespace): 공백 정리는 입력 텍스트를 브라우저에서 처리해 중복 공백을 정리하거나 모든 공백을 제거하는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [텍스트 반복기 — 브라우저 텍스트 처리](https://utillica.com/ko/text-repeat): 텍스트 반복기는 입력 텍스트를 브라우저에서 처리해 입력한 텍스트를 정해진 횟수만큼 반복하는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [텍스트 뒤집기 — 브라우저 텍스트 처리](https://utillica.com/ko/reverse-text): 텍스트 뒤집기는 입력 텍스트를 브라우저에서 처리해 글자 또는 단어 순서를 반대로 바꾸는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [단어 빈도 계산기 — 브라우저 텍스트 처리](https://utillica.com/ko/word-frequency): 단어 빈도 계산기는 입력 텍스트를 브라우저에서 처리해 단어별 등장 횟수를 세는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [글자 빈도 계산기 — 브라우저 텍스트 처리](https://utillica.com/ko/char-frequency): 글자 빈도 계산기는 입력 텍스트를 브라우저에서 처리해 글자별 등장 횟수를 세는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [슬러그 생성기 — 브라우저 텍스트 처리](https://utillica.com/ko/slug-generator): 슬러그 생성기는 입력 텍스트를 브라우저에서 처리해 제목을 URL에 쓰기 좋은 slug로 변환하는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [줄 수 세기 — 브라우저 텍스트 처리](https://utillica.com/ko/line-counter): 줄 수 세기는 입력 텍스트를 브라우저에서 처리해 전체 줄과 빈 줄 제외 줄 수를 세는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [원고지 매수 계산기 — 브라우저 텍스트 처리](https://utillica.com/ko/manuscript-pages): 원고지 매수 계산기는 입력 텍스트를 브라우저에서 처리해 200자 원고지 기준 예상 매수를 계산하는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [SNS 글자수 체크 — 브라우저 텍스트 처리](https://utillica.com/ko/sns-counter): SNS 글자수 체크는 입력 텍스트를 브라우저에서 처리해 SNS 게시글 길이 제한 대비 글자수를 확인하는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [마크다운 표 생성기 — 브라우저 텍스트 처리](https://utillica.com/ko/markdown-table): 마크다운 표 생성기는 입력 텍스트를 브라우저에서 처리해 CSV 형태 텍스트를 마크다운 표로 변환하는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [CSV 텍스트 정리 — 브라우저 텍스트 처리](https://utillica.com/ko/csv-cleaner): CSV 텍스트 정리는 입력 텍스트를 브라우저에서 처리해 CSV 텍스트의 셀 공백과 줄 형식을 정리하는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [텍스트 diff — 브라우저 텍스트 처리](https://utillica.com/ko/text-diff): 텍스트 diff는 입력 텍스트를 브라우저에서 처리해 구분선 앞뒤 텍스트의 줄 단위 차이를 비교하는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [Lorem Ipsum 생성기 — 브라우저 텍스트 처리](https://utillica.com/ko/lorem-ipsum): Lorem Ipsum 생성기는 입력 텍스트를 브라우저에서 처리해 더미 문단을 생성하는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [ROT13 변환기 — 브라우저 텍스트 처리](https://utillica.com/ko/rot13): ROT13 변환기는 입력 텍스트를 브라우저에서 처리해 영문자를 ROT13 방식으로 변환하는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [시저 암호 변환기 — 브라우저 텍스트 처리](https://utillica.com/ko/caesar-cipher): 시저 암호 변환기는 입력 텍스트를 브라우저에서 처리해 영문자를 선택한 이동값만큼 밀어 변환하는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [모스 부호 변환기 — 브라우저 텍스트 처리](https://utillica.com/ko/morse-code): 모스 부호 변환기는 입력 텍스트를 브라우저에서 처리해 영문자와 숫자를 모스 부호로 변환하는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [숫자 천단위 콤마 — 브라우저 텍스트 처리](https://utillica.com/ko/number-formatter): 숫자 천단위 콤마는 입력 텍스트를 브라우저에서 처리해 숫자에 지역별 천단위 구분 기호를 붙이는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [찾기·바꾸기 — 텍스트 문자열 치환](https://utillica.com/ko/find-replace): 찾기·바꾸기는 입력 텍스트에서 특정 문자열을 찾아 지정한 문자열로 모두 치환하는 텍스트 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [한글 초성 추출기 — 한국어 텍스트 변환](https://utillica.com/ko/hangul-initials): 한글 초성 추출기는 한국어 텍스트를 입력해 한글 음절에서 초성만 추출하는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [한글 로마자 변환기 — 한국어 텍스트 변환](https://utillica.com/ko/hangul-romanize): 한글 로마자 변환기는 한국어 텍스트를 입력해 한글을 로마자 표기 형태로 간이 변환하는 도구입니다.
  Sources: National Institute of Korean Language (국립국어원): Romanization of Korean
- [숫자 한글 표기 — 한국어 텍스트 변환](https://utillica.com/ko/number-to-korean): 숫자 한글 표기는 한국어 텍스트를 입력해 숫자를 한글 금액 표기로 바꾸는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [키워드 밀도 검사기 — 브라우저 텍스트 분석](https://utillica.com/ko/keyword-density): 키워드 밀도 검사기는 붙여넣은 텍스트를 브라우저에서 분석해 단어 빈도와 density 비율을 계산하는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [가독성 점수 계산기 — 브라우저 텍스트 분석](https://utillica.com/ko/readability-score): 가독성 점수 계산기는 붙여넣은 텍스트를 브라우저에서 분석해 Flesch Reading Ease와 Flesch-Kincaid Grade를 계산하는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [문장 수 세기 — 브라우저 텍스트 분석](https://utillica.com/ko/sentence-counter): 문장 수 세기는 붙여넣은 텍스트를 브라우저에서 분석해 문장, 단어, 문단, 평균 문장 길이를 계산하는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [Bionic Reading 변환기 — 브라우저 텍스트 분석](https://utillica.com/ko/bionic-reading): Bionic Reading 변환기는 붙여넣은 텍스트를 브라우저에서 분석해 단어 앞부분을 강조한 HTML 미리보기와 plain text를 만드는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [텍스트 손글씨 변환기 — 브라우저 텍스트 변환](https://utillica.com/ko/text-to-handwriting): 텍스트 손글씨 변환기는 텍스트를 붙여넣고 텍스트를 손글씨 스타일 canvas 이미지로 변환하는 클라이언트 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [NATO 음성 문자 변환기 — 브라우저 텍스트 변환](https://utillica.com/ko/nato-phonetic): NATO 음성 문자 변환기는 텍스트를 붙여넣고 A를 Alpha로 바꾸거나 Alpha Bravo를 AB로 되돌리는 클라이언트 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [이메일 정규화 도구 — 브라우저 텍스트 변환](https://utillica.com/ko/email-normalizer): 이메일 정규화 도구는 텍스트를 붙여넣고 도메인 대소문자와 Gmail dot/plus 별칭을 정리하는 클라이언트 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [목록 변환기 — 브라우저 텍스트 변환](https://utillica.com/ko/list-converter): 목록 변환기는 텍스트를 붙여넣고 목록을 정렬, 중복 제거, CSV 결합, 1열 추출 형식으로 바꾸는 클라이언트 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [PDF Summarizer — AI 텍스트 도구](https://utillica.com/ko/pdf-summarizer): PDF Summarizer는 입력을 /api AI job으로 보내 PDF를 요약하고 핵심 포인트를 추출하는 서버 의존 도구입니다.
  Sources: Utillica AI tools provider and retention policy
- [Text Summarizer — AI 텍스트 도구](https://utillica.com/ko/text-summarizer): Text Summarizer는 입력을 /api AI job으로 보내 텍스트를 짧게 요약하는 서버 의존 도구입니다.
  Sources: Utillica AI tools provider and retention policy
- [Text Rewriter — AI 텍스트 도구](https://utillica.com/ko/text-rewriter): Text Rewriter는 입력을 /api AI job으로 보내 톤에 맞춰 텍스트를 다시 쓰는 서버 의존 도구입니다.
  Sources: Utillica AI tools provider and retention policy
- [Grammar Fixer — AI 텍스트 도구](https://utillica.com/ko/grammar-fixer): Grammar Fixer는 입력을 /api AI job으로 보내 문법과 표현 오류를 수정하는 서버 의존 도구입니다.
  Sources: Utillica AI tools provider and retention policy
- [온라인 메모장 — 자동 저장·글자수·txt 다운로드](https://utillica.com/ko/online-notepad): 온라인 메모장은 설치나 로그인 없이 브라우저에서 바로 글을 쓰고, 입력 내용을 이 브라우저의 localStorage에 자동 저장하는 무료 메모 도구입니다.
  Sources: Web Storage API (localStorage)
- [자소서 멀티 문항 카운터 — 문항별 글자수·바이트 자동저장](https://utillica.com/ko/cover-letter-counter): 자소서 멀티 문항 카운터는 여러 자기소개서 문항을 제목 기준으로 나누어 문항별 글자수, 공백 제외 글자수, UTF-8 바이트, 단어 수를 계산하고 로컬에 자동저장하는 브라우저 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; TextEncoder
- [글 읽기 시간 계산기 — 묵독·낭독·발표 시간](https://utillica.com/ko/reading-time): 글 읽기 시간 계산기는 텍스트 길이를 분당 단어 또는 어절 속도로 나누어 예상 소요 시간을 계산하는 콘텐츠 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [Markdown 목차 생성기 — heading anchor TOC](https://utillica.com/ko/markdown-toc): Markdown 목차 생성기는 # heading 줄을 찾아 들여쓰기된 링크 목록으로 바꾸는 문서 편집 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [Zero-width 문자 탐지·제거기 — 보이지 않는 문자 정리](https://utillica.com/ko/zero-width-cleaner): Zero-width 문자 탐지·제거기는 텍스트 안의 보이지 않는 유니코드 제어 문자를 찾아 표시하거나 제거하는 텍스트 정리 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [문장 부호 정규화기 — 따옴표·말줄임표·대시 정리](https://utillica.com/ko/punctuation-normalizer): 문장 부호 정규화기는 텍스트의 따옴표, 대시, 말줄임표, 공백을 일관된 스타일로 바꾸는 교정 보조 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [한글 IPA 발음 변환기 — 브라우저 콘텐츠 도구](https://utillica.com/ko/hangul-ipa-converter): 한글 IPA 발음 변환기는 한글 음절을 단순 IPA 근사 표기로 변환하는 도구 브라우저 기반 콘텐츠 보조 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification; International Phonetic Association: IPA charts
- [텍스트 → ASCII 아트 — 브라우저 콘텐츠 도구](https://utillica.com/ko/ascii-art-text): 텍스트 → ASCII 아트는 영문·숫자 텍스트를 고정폭 ASCII 배너로 변환하는 도구 브라우저 기반 콘텐츠 보조 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [이모지·특수문자 콤보 사전 — 브라우저 콘텐츠 도구](https://utillica.com/ko/emoji-combo-dictionary): 이모지·특수문자 콤보 사전는 검색어로 이모지·특수문자 조합을 찾는 정적 사전 도구 브라우저 기반 콘텐츠 보조 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification; Unicode Standard: Emoji
- [발표 대본 타이머 — 브라우저 콘텐츠 도구](https://utillica.com/ko/presentation-script-timer): 발표 대본 타이머는 대본 단락별 예상 발표 시간과 누적 타임라인을 계산하는 도구 브라우저 기반 콘텐츠 보조 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [표절 위험 자가진단(로컬) — 브라우저 콘텐츠 도구](https://utillica.com/ko/local-plagiarism-risk-check): 표절 위험 자가진단(로컬)는 두 텍스트 또는 한 문서 안의 반복 n-gram 유사도를 로컬에서 점검하는 도구 브라우저 기반 콘텐츠 보조 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification

## 날짜·시간

Category hub: https://utillica.com/ko/category/datetime

- [D-Day 계산기 — 날짜 계산](https://utillica.com/ko/dday): D-Day 계산기는 입력한 날짜를 기준으로 목표일까지 남은 일수 또는 지난 일수를 계산하는 도구입니다.
  Sources: ECMAScript Language Specification
- [날짜 차이 계산기 — 날짜 계산](https://utillica.com/ko/date-diff): 날짜 차이 계산기는 입력한 날짜를 기준으로 두 날짜 사이의 일수를 계산하는 도구입니다.
  Sources: ECMAScript Language Specification
- [나이 계산기 — 날짜 계산](https://utillica.com/ko/age): 나이 계산기는 입력한 날짜를 기준으로 생년월일 기준 만 나이와 살아온 일수를 계산하는 도구입니다.
  Sources: ECMAScript Language Specification
- [만 나이 계산기 — 생년월일로 바로 계산](https://utillica.com/ko/korean-age): 만 나이 계산기는 입력한 날짜를 기준으로 생년월일 기준 법적 만 나이를 계산하는 도구입니다.
  Sources: Administrative Basic Act — age calculation standard (man-nai unification); ECMAScript Language Specification
- [요일 계산기 — 날짜 계산](https://utillica.com/ko/weekday): 요일 계산기는 입력한 날짜를 기준으로 특정 날짜의 요일을 계산하는 도구입니다.
  Sources: ECMAScript Language Specification
- [주차 계산기 — 날짜 계산](https://utillica.com/ko/week-number): 주차 계산기는 입력한 날짜를 기준으로 특정 날짜의 ISO 주차와 연중 일수를 계산하는 도구입니다.
  Sources: ECMAScript Language Specification
- [날짜 더하기/빼기 — 기준일 ± 일수 계산](https://utillica.com/ko/date-add): 날짜 더하기/빼기는 기준일에 정수 일수를 더하거나 빼서 결과 날짜를 구하는 날짜 계산 도구입니다.
  Sources: ECMAScript Language Specification
- [영업일 계산기 — 주말·공휴일 제외 평일 수](https://utillica.com/ko/business-days): 영업일 계산기는 두 날짜 사이에서 토요일, 일요일, 사용자가 입력한 공휴일을 제외한 평일 수를 계산하는 날짜 도구입니다.
  Sources: ECMAScript Language Specification
- [타임존 변환기 — UTC 오프셋 시간 변환](https://utillica.com/ko/timezone): 타임존 변환기는 특정 날짜와 시간을 한 UTC 오프셋 기준에서 다른 UTC 오프셋 기준 시간으로 바꾸는 날짜·시간 도구입니다.
  Sources: ECMAScript Language Specification
- [세계 시간 — 주요 도시 현재 시간](https://utillica.com/ko/world-clock): 세계 시간 도구는 현재 브라우저 시각을 기준으로 주요 UTC 오프셋 지역의 시간을 함께 보여주는 날짜·시간 도구입니다.
  Sources: ECMAScript Language Specification
- [12/24시간 변환기 — 오전·오후 시간 변환](https://utillica.com/ko/military-time): 12/24시간 변환기는 오전·오후가 있는 12시간 표기와 00:00부터 23:59까지의 24시간 표기를 서로 바꾸는 시간 도구입니다.
  Sources: ECMAScript Language Specification
- [시간 합산 계산기 — HH:MM 시간 계산](https://utillica.com/ko/time-duration): 시간 합산 계산기는 여러 개의 HH:MM 시간 값을 더해 총 소요 시간을 계산하는 시간 도구입니다.
  Sources: ECMAScript Language Specification
- [시간 차이 계산기 — HH:MM 시간 계산](https://utillica.com/ko/time-diff): 시간 차이 계산기는 시작 시각과 종료 시각 사이의 경과 시간을 계산하는 시간 도구입니다.
  Sources: ECMAScript Language Specification
- [카운트다운 계산기 — 기념일 날짜 계산](https://utillica.com/ko/countdown): 카운트다운 계산기는 기준 날짜를 바탕으로 목표 날짜·시간까지 남은 시간을 계산하는 도구입니다.
  Sources: ECMAScript Language Specification
- [기념일 계산기 — 기념일 날짜 계산](https://utillica.com/ko/anniversary): 기념일 계산기는 기준 날짜를 바탕으로 기준일의 다음 기념일까지 남은 일수와 경과 연수를 계산하는 도구입니다.
  Sources: ECMAScript Language Specification
- [100일 계산기 — 기념일 날짜 계산](https://utillica.com/ko/hundred-days): 100일 계산기는 기준 날짜를 바탕으로 시작일로부터 100일째 되는 날짜를 계산하는 도구입니다.
  Sources: ECMAScript Language Specification
- [임신 주수 계산기 — 예상 날짜 계산](https://utillica.com/ko/pregnancy-week): 임신 주수 계산기는 마지막 생리 시작일과 주기 정보를 기준으로 현재 임신 주수와 출산 예정일을 계산하는 도구입니다.
  Sources: ACOG: Methods for Estimating the Due Date; Johns Hopkins Medicine: Calculating a Due Date
- [출산 예정일 계산기 — 예상 날짜 계산](https://utillica.com/ko/pregnancy-due): 출산 예정일 계산기는 마지막 생리 시작일과 주기 정보를 기준으로 마지막 생리 시작일 기준 출산 예정일을 계산하는 도구입니다.
  Sources: ACOG: Methods for Estimating the Due Date; Johns Hopkins Medicine: Calculating a Due Date
- [배란일 계산기 — 예상 날짜 계산](https://utillica.com/ko/ovulation): 배란일 계산기는 마지막 생리 시작일과 주기 정보를 기준으로 평균 생리 주기 기준 배란일과 가임 기간을 계산하는 도구입니다.
  Sources: Office on Women’s Health: Ovulation Calculator
- [별자리 계산기 — 날짜 기준 계산](https://utillica.com/ko/zodiac): 별자리 계산기는 입력한 날짜나 기준값으로 생일 기준 서양 별자리를 찾는 도구입니다.
  Sources: ECMAScript Language Specification
- [띠 계산기 — 날짜 기준 계산](https://utillica.com/ko/korean-zodiac): 띠 계산기는 입력한 날짜나 기준값으로 출생연도 기준 십이지 띠를 계산하는 도구입니다.
  Sources: ECMAScript Language Specification
- [수능 D-Day 계산기 — 날짜 기준 계산](https://utillica.com/ko/school-dday): 수능 D-Day 계산기는 입력한 날짜나 기준값으로 2027학년도 수능일까지 남은 날짜를 계산하는 도구입니다.
  Sources: Ministry of Education (교육부): 2027 Korean CSAT date
- [군 전역일 계산기 — 날짜 기준 계산](https://utillica.com/ko/military-discharge): 군 전역일 계산기는 입력한 날짜나 기준값으로 입대일과 복무 개월 기준 전역 예정일을 계산하는 도구입니다.
  Sources: ECMAScript Language Specification
- [타이머 — 분·초 카운트다운](https://utillica.com/ko/timer): 타이머는 지정한 시간에서 1초씩 줄어드는 카운트다운을 브라우저에서 실행하는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [스톱워치 — 경과 시간 측정](https://utillica.com/ko/stopwatch): 스톱워치는 시작 시점부터 현재까지의 경과 시간을 브라우저에서 측정하는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [달 위상 계산기 — 오늘의 달 모양·조명률·보름달 날짜](https://utillica.com/ko/moon-phase): 달 위상 계산기는 선택한 날짜의 달 위상(삭·초승달·상현·보름·하현·그믐달)과 조명률(%)을 평균 삭망월 근사식으로 계산하는 날짜·천문 도구입니다.
  Sources: Phases of the Moon; Six Millennium Catalog of Phases of the Moon (computed with Meeus algorithms)
- [일출 일몰 계산기 — 도시·좌표별 해 뜨는 시간과 지는 시간](https://utillica.com/ko/sunrise-sunset): 일출 일몰 계산기는 날짜와 위도·경도를 입력하면 NOAA 태양 위치 공식으로 일출·일몰·남중(태양 정오) 시각과 낮 길이를 계산하는 천문 도구입니다.
  Sources: NOAA Solar Calculator; NOAA Solar Calculation Details (sunrise/sunset equations)
- [회의 시간 찾기 — 다중 도시 시간대 겹침 비교](https://utillica.com/ko/meeting-planner): 회의 시간 찾기는 여러 도시(2~5개)의 UTC 오프셋을 비교해 모든 도시가 근무 시간(09:00~18:00)에 들어오는 회의 시간대를 24시간 표로 보여주는 시간대 도구입니다.
  Sources: IANA Time Zone Database; ECMAScript Language Specification
- [달력 생성기 — 인쇄용 월간·연간 달력 (한국 공휴일 표시)](https://utillica.com/ko/calendar-generator): 달력 생성기는 연도와 월을 선택하면 한국 공휴일이 표시된 인쇄용 월간·연간 달력을 브라우저에서 만들어 주는 날짜 도구입니다.
  Sources: 관공서의 공휴일에 관한 규정 (Regulations on Public Holidays of Government Offices); ECMAScript Language Specification
- [음력 양력 변환기 — 윤달·간지(육십갑자) 표시](https://utillica.com/ko/lunar-solar-converter): 음력 양력 변환기는 한국 음력과 양력(그레고리력) 날짜를 서로 변환하고 윤달 여부와 간지(육십갑자)를 함께 보여주는 날짜 변환 도구입니다.
  Sources: 음양력 변환 계산 (Lunar-Solar Conversion); korean-lunar-calendar — KASI-based conversion table library
- [손없는날 캘린더 — 월별 이사 길일 목록](https://utillica.com/ko/son-eomneun-nal-calendar): 손없는날 캘린더는 선택한 양력 월의 각 날짜를 한국 음력으로 변환하고 음력 일자가 9, 10, 19, 20, 29, 30일인 날을 목록화하는 민속 일정 도구입니다.
  Sources: 음양력 변환 계산 (Lunar-Solar Conversion); korean-lunar-calendar — KASI-based conversion table library; MDN Web Docs: Client-side web APIs
- [RRULE 생성기 — 반복 일정 문자열 만들기](https://utillica.com/ko/rrule-generator): RRULE 생성기는 반복 일정 조건을 폼 입력으로 받아 iCalendar 표준의 RRULE 문자열을 만드는 날짜 개발 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [근무일 카운트다운 — 목표일까지 영업일 수](https://utillica.com/ko/workday-countdown): 근무일 카운트다운은 오늘부터 목표일까지 주말과 사용자가 입력한 휴일을 제외한 남은 업무일 수를 계산하는 날짜 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [이사 체크리스트 생성기 — 브라우저 일정 도구](https://utillica.com/ko/moving-checklist): 이사 체크리스트 생성기는 이사 날짜 기준 D-30부터 D+7까지 준비 일정을 생성하는 도구 브라우저 기반 일정·날짜 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [ICS 일정 파일 생성기 — 브라우저 일정 도구](https://utillica.com/ko/ics-event-generator): ICS 일정 파일 생성기는 제목·시작일·시간·길이로 iCalendar .ics 이벤트 텍스트를 생성하는 도구 브라우저 기반 일정·날짜 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [프로젝트 역산 스케줄러 — 브라우저 일정 도구](https://utillica.com/ko/project-backward-scheduler): 프로젝트 역산 스케줄러는 마감일과 단계 간격으로 중간 마일스톤 날짜를 역산하는 도구 브라우저 기반 일정·날짜 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [두 사람 나이차·띠 비교 — 브라우저 일정 도구](https://utillica.com/ko/age-zodiac-compare): 두 사람 나이차·띠 비교는 두 생년월일의 만 나이 차이와 한국 띠를 비교하는 도구 브라우저 기반 일정·날짜 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [근속연수·호봉 계산기 — 브라우저 일정 도구](https://utillica.com/ko/tenure-calculator): 근속연수·호봉 계산기는 입사일 기준 근속 기간과 다음 승급일까지 남은 기간을 계산하는 도구 브라우저 기반 일정·날짜 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [시차 적응 플래너 — 브라우저 일정 도구](https://utillica.com/ko/jet-lag-planner): 시차 적응 플래너는 출발지·도착지 UTC offset 차이로 수면·빛 노출 조정 계획을 생성하는 도구 브라우저 기반 시간·일정 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [회의 초대 문구 생성기 — 브라우저 일정 도구](https://utillica.com/ko/meeting-invite-message): 회의 초대 문구 생성기는 회의 시간·안건으로 초대 문구와 캘린더 메모 초안을 생성하는 도구 브라우저 기반 시간·일정 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [시간대 겹침 히트맵 — 브라우저 일정 도구](https://utillica.com/ko/timezone-overlap-heatmap): 시간대 겹침 히트맵는 여러 UTC offset의 근무 시간 겹침을 24시간 표로 보여 주는 도구 브라우저 기반 시간·일정 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification

## 색상

Category hub: https://utillica.com/ko/category/color

- [HEX RGB 변환기 — 색상 코드 변환](https://utillica.com/ko/hex-to-rgb): HEX RGB 변환기는 #RRGGBB 색상 코드를 red, green, blue 숫자 값으로 바꾸는 도구입니다.
  Sources: ECMAScript Language Specification
- [HEX HSL 변환기 — 색상 코드 변환](https://utillica.com/ko/hex-to-hsl): HEX HSL 변환기는 HEX 색상을 색상각, 채도, 명도로 표현하는 HSL 값으로 바꾸는 도구입니다.
  Sources: ECMAScript Language Specification
- [랜덤 색상 생성기 — HEX 색상](https://utillica.com/ko/random-color): 랜덤 색상 생성기는 무작위 HEX 색상 코드를 만들고 RGB/HSL 값을 함께 보여주는 도구입니다.
  Sources: ECMAScript Language Specification
- [색상 피커 — 색상·디자인 계산기](https://utillica.com/ko/color-picker): 색상 피커는 브라우저 색상 입력으로 HEX/RGB/HSL 값을 확인하는 브라우저 기반 디자인 유틸리티입니다.
  Sources: ECMAScript Language Specification
- [RGB-CMYK 변환기 — 색상·디자인 계산기](https://utillica.com/ko/rgb-to-cmyk): RGB-CMYK 변환기는 RGB 색상을 인쇄용 CMYK 비율로 변환하는 브라우저 기반 디자인 유틸리티입니다.
  Sources: ECMAScript Language Specification
- [팔레트 생성기 — 색상·디자인 계산기](https://utillica.com/ko/palette-generator): 팔레트 생성기는 기준 HEX 색상으로 조화 색상 팔레트를 생성하는 브라우저 기반 디자인 유틸리티입니다.
  Sources: ECMAScript Language Specification
- [그라데이션 생성기 — 색상·디자인 계산기](https://utillica.com/ko/gradient-generator): 그라데이션 생성기는 두 HEX 색상을 CSS linear-gradient 값으로 조합하는 브라우저 기반 디자인 유틸리티입니다.
  Sources: ECMAScript Language Specification
- [색상 혼합 계산기 — 색상·디자인 계산기](https://utillica.com/ko/color-mixer): 색상 혼합 계산기는 두 HEX 색상을 지정한 비율로 혼합하는 브라우저 기반 디자인 유틸리티입니다.
  Sources: ECMAScript Language Specification
- [Tint/Shade 생성기 — 색상·디자인 계산기](https://utillica.com/ko/shades-generator): Tint/Shade 생성기는 HEX 색상의 밝은 tint와 어두운 shade 값을 생성하는 브라우저 기반 디자인 유틸리티입니다.
  Sources: ECMAScript Language Specification
- [CSS named color lookup — 색상·디자인 계산기](https://utillica.com/ko/named-colors): CSS named color lookup는 CSS 색상 이름을 HEX/RGB 값으로 조회하는 브라우저 기반 디자인 유틸리티입니다.
  Sources: ECMAScript Language Specification
- [Tailwind 색상 근사값 찾기 — 색상·디자인 계산기](https://utillica.com/ko/tailwind-color-match): Tailwind 색상 근사값 찾기는 HEX 색상과 가까운 Tailwind 기본 색상 토큰을 찾는 브라우저 기반 디자인 유틸리티입니다.
  Sources: ECMAScript Language Specification
- [Opacity 색상 계산기 — 색상·디자인 계산기](https://utillica.com/ko/opacity-color): Opacity 색상 계산기는 HEX 색상과 투명도를 CSS rgba 값으로 변환하는 브라우저 기반 디자인 유틸리티입니다.
  Sources: ECMAScript Language Specification
- [Box-shadow 생성기 — 색상·디자인 계산기](https://utillica.com/ko/box-shadow-generator): Box-shadow 생성기는 offset, blur, spread, 색상으로 CSS box-shadow를 생성하는 브라우저 기반 디자인 유틸리티입니다.
  Sources: ECMAScript Language Specification
- [Border-radius preview — 색상·디자인 계산기](https://utillica.com/ko/border-radius-preview): Border-radius preview는 네 모서리 radius 값을 CSS border-radius로 정리하는 브라우저 기반 디자인 유틸리티입니다.
  Sources: ECMAScript Language Specification
- [CSS clamp 생성기 — 색상·디자인 계산기](https://utillica.com/ko/css-clamp-generator): CSS clamp 생성기는 최소·선호·최대 값을 CSS clamp()로 조합하는 브라우저 기반 디자인 유틸리티입니다.
  Sources: ECMAScript Language Specification
- [rem-px 변환기 — 색상·디자인 계산기](https://utillica.com/ko/rem-px): rem-px 변환기는 px와 rem 값을 기준 폰트 크기로 상호 변환하는 브라우저 기반 디자인 유틸리티입니다.
  Sources: ECMAScript Language Specification
- [Aspect ratio 계산기 — 색상·디자인 계산기](https://utillica.com/ko/aspect-ratio): Aspect ratio 계산기는 가로·세로 값으로 CSS aspect-ratio와 축소 비율을 계산하는 브라우저 기반 디자인 유틸리티입니다.
  Sources: ECMAScript Language Specification
- [Tailwind 색상 스케일 생성기 — 디자인 생성기](https://utillica.com/ko/tailwind-color-generator): Tailwind 색상 스케일 생성기는 base color에서 50-950 스케일을 생성하는 클라이언트 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [팔레트 시각화 — 디자인 생성기](https://utillica.com/ko/palette-visualizer): 팔레트 시각화는 팔레트를 UI mockup에 적용해 보는 클라이언트 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [색상 이름 찾기 — 디자인 생성기](https://utillica.com/ko/color-name-finder): 색상 이름 찾기는 HEX에 가까운 색상 이름을 찾는 클라이언트 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [CSS 삼각형 생성기 — 디자인 생성기](https://utillica.com/ko/css-triangle-generator): CSS 삼각형 생성기는 border 기반 CSS 삼각형 코드를 생성하는 클라이언트 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [색상 대비 검사 — WCAG AA/AAA 체크](https://utillica.com/ko/contrast-checker): 색상 대비 검사는 전경색과 배경색의 상대 휘도를 비교해 WCAG 기준 대비율과 통과 여부를 계산하는 도구입니다.
  Sources: Web Content Accessibility Guidelines (WCAG) 2.2
- [이미지 팔레트 추출 — 브라우저 색상 분석](https://utillica.com/ko/color-from-image): 이미지 팔레트 추출는 이미지에서 대표 HEX 색상 팔레트를 추출하는 브라우저 기반 색상 분석 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [색맹 시뮬레이터 — 브라우저 색상 분석](https://utillica.com/ko/color-blindness): 색맹 시뮬레이터는 HEX 색상을 주요 색각 이상 유형으로 근사 변환하는 브라우저 기반 색상 분석 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs

## 이미지

Category hub: https://utillica.com/ko/category/image

- [이미지 리사이즈 — 브라우저 이미지 도구](https://utillica.com/ko/image-resize): 이미지 리사이즈는 이미지의 최대 가로 폭을 기준으로 비율을 유지해 줄이는 브라우저 기반 이미지 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [이미지 압축 — 브라우저 이미지 도구](https://utillica.com/ko/image-compress): 이미지 압축는 이미지를 JPEG로 재인코딩해 용량을 줄이는 브라우저 기반 이미지 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [이미지 크롭 — 브라우저 이미지 도구](https://utillica.com/ko/image-crop): 이미지 크롭는 이미지에서 지정한 영역만 잘라내는 브라우저 기반 이미지 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [이미지 회전 — 브라우저 이미지 도구](https://utillica.com/ko/image-rotate): 이미지 회전는 이미지를 90도 단위로 회전하는 브라우저 기반 이미지 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [이미지 메타데이터 제거 — 브라우저 이미지 도구](https://utillica.com/ko/image-metadata-remove): 이미지 메타데이터 제거는 이미지를 다시 그려 EXIF 등 파일 메타데이터를 제거하는 브라우저 기반 이미지 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [이미지 Base64 변환 — 브라우저 이미지 도구](https://utillica.com/ko/image-base64): 이미지 Base64 변환는 이미지를 data URL Base64 텍스트로 변환하는 브라우저 기반 이미지 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [HEIC to JPG 변환기 — 브라우저 이미지 포맷 도구](https://utillica.com/ko/heic-to-jpg): HEIC to JPG 변환기는 HEIC 이미지를 브라우저에서 디코딩한 뒤 Canvas로 다시 인코딩해 JPG 파일을 만드는 이미지 포맷 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [HEIC to PNG 변환기 — 브라우저 이미지 포맷 도구](https://utillica.com/ko/heic-to-png): HEIC to PNG 변환기는 HEIC 이미지를 브라우저에서 디코딩한 뒤 Canvas로 다시 인코딩해 PNG 파일을 만드는 이미지 포맷 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [HEIC to WebP 변환기 — 브라우저 이미지 포맷 도구](https://utillica.com/ko/heic-to-webp): HEIC to WebP 변환기는 HEIC 이미지를 브라우저에서 디코딩한 뒤 Canvas로 다시 인코딩해 WebP 파일을 만드는 이미지 포맷 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [HEIF to JPG 변환기 — 브라우저 이미지 포맷 도구](https://utillica.com/ko/heif-to-jpg): HEIF to JPG 변환기는 HEIF 이미지를 브라우저에서 디코딩한 뒤 Canvas로 다시 인코딩해 JPG 파일을 만드는 이미지 포맷 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [AVIF to JPG 변환기 — 브라우저 이미지 포맷 도구](https://utillica.com/ko/avif-to-jpg): AVIF to JPG 변환기는 AVIF 이미지를 브라우저에서 디코딩한 뒤 Canvas로 다시 인코딩해 JPG 파일을 만드는 이미지 포맷 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [AVIF to PNG 변환기 — 브라우저 이미지 포맷 도구](https://utillica.com/ko/avif-to-png): AVIF to PNG 변환기는 AVIF 이미지를 브라우저에서 디코딩한 뒤 Canvas로 다시 인코딩해 PNG 파일을 만드는 이미지 포맷 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [JPG to AVIF 변환기 — 브라우저 이미지 포맷 도구](https://utillica.com/ko/jpg-to-avif): JPG to AVIF 변환기는 JPG 이미지를 브라우저에서 디코딩한 뒤 Canvas로 다시 인코딩해 AVIF 파일을 만드는 이미지 포맷 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [PNG to AVIF 변환기 — 브라우저 이미지 포맷 도구](https://utillica.com/ko/png-to-avif): PNG to AVIF 변환기는 PNG 이미지를 브라우저에서 디코딩한 뒤 Canvas로 다시 인코딩해 AVIF 파일을 만드는 이미지 포맷 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [WebP to AVIF 변환기 — 브라우저 이미지 포맷 도구](https://utillica.com/ko/webp-to-avif): WebP to AVIF 변환기는 WebP 이미지를 브라우저에서 디코딩한 뒤 Canvas로 다시 인코딩해 AVIF 파일을 만드는 이미지 포맷 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [WebP to JPG 변환기 — 브라우저 이미지 포맷 도구](https://utillica.com/ko/webp-to-jpg): WebP to JPG 변환기는 WebP 이미지를 브라우저에서 디코딩한 뒤 Canvas로 다시 인코딩해 JPG 파일을 만드는 이미지 포맷 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [WebP to PNG 변환기 — 브라우저 이미지 포맷 도구](https://utillica.com/ko/webp-to-png): WebP to PNG 변환기는 WebP 이미지를 브라우저에서 디코딩한 뒤 Canvas로 다시 인코딩해 PNG 파일을 만드는 이미지 포맷 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [JPG to WebP 변환기 — 브라우저 이미지 포맷 도구](https://utillica.com/ko/jpg-to-webp): JPG to WebP 변환기는 JPG 이미지를 브라우저에서 디코딩한 뒤 Canvas로 다시 인코딩해 WebP 파일을 만드는 이미지 포맷 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [PNG to WebP 변환기 — 브라우저 이미지 포맷 도구](https://utillica.com/ko/png-to-webp): PNG to WebP 변환기는 PNG 이미지를 브라우저에서 디코딩한 뒤 Canvas로 다시 인코딩해 WebP 파일을 만드는 이미지 포맷 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [PNG to JPG 변환기 — 브라우저 이미지 포맷 도구](https://utillica.com/ko/png-to-jpg): PNG to JPG 변환기는 PNG 이미지를 브라우저에서 디코딩한 뒤 Canvas로 다시 인코딩해 JPG 파일을 만드는 이미지 포맷 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [JPG to PNG 변환기 — 브라우저 이미지 포맷 도구](https://utillica.com/ko/jpg-to-png): JPG to PNG 변환기는 JPG 이미지를 브라우저에서 디코딩한 뒤 Canvas로 다시 인코딩해 PNG 파일을 만드는 이미지 포맷 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [JPG to WebP 변환기 — 브라우저 이미지 포맷 도구](https://utillica.com/ko/webp-converter): JPG to WebP 변환기는 JPG 이미지를 브라우저에서 디코딩한 뒤 Canvas로 다시 인코딩해 WebP 파일을 만드는 이미지 포맷 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [JPG to AVIF 변환기 — 브라우저 이미지 포맷 도구](https://utillica.com/ko/avif-converter): JPG to AVIF 변환기는 JPG 이미지를 브라우저에서 디코딩한 뒤 Canvas로 다시 인코딩해 AVIF 파일을 만드는 이미지 포맷 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [Background Remover — AI 이미지 도구](https://utillica.com/ko/background-remover): Background Remover는 파일을 /api AI job으로 업로드해 이미지 배경을 투명 PNG 결과로 제거하는 서버 의존 도구입니다.
  Sources: Utillica AI tools provider and retention policy
- [Image Upscaler — AI 이미지 도구](https://utillica.com/ko/image-upscaler): Image Upscaler는 파일을 /api AI job으로 업로드해 이미지를 업스케일 결과로 처리하는 서버 의존 도구입니다.
  Sources: Utillica AI tools provider and retention policy
- [OCR Image to Text — AI 이미지 도구](https://utillica.com/ko/ocr-image-to-text): OCR Image to Text는 파일을 /api AI job으로 업로드해 이미지 또는 PDF 페이지에서 텍스트를 추출하는 서버 의존 도구입니다.
  Sources: Utillica AI tools provider and retention policy
- [파일 해시 계산기 — 브라우저 파일 유틸](https://utillica.com/ko/file-hash): 파일 해시 계산기는 파일의 SHA-256과 SHA-1 해시를 계산하는 브라우저 기반 파일 유틸리티입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [EXIF 보기 — 브라우저 파일 유틸](https://utillica.com/ko/exif-viewer): EXIF 보기는 JPEG 이미지의 기본 EXIF 태그를 확인하는 브라우저 기반 파일 유틸리티입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [파일 크기 변환기 — 브라우저 파일 유틸](https://utillica.com/ko/file-size-converter): 파일 크기 변환기는 바이트 값을 KB, MB, GB, KiB, MiB 단위로 변환하는 브라우저 기반 파일 유틸리티입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [파일명 일괄 정리 규칙 생성기 — 브라우저 파일 유틸](https://utillica.com/ko/filename-cleaner): 파일명 일괄 정리 규칙 생성기는 파일명 목록을 안전한 kebab-case 형태로 정리하는 브라우저 기반 파일 유틸리티입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [PDF to Word — 서버 파일 변환](https://utillica.com/ko/pdf-to-word): PDF to Word는 파일을 /api 변환 job으로 업로드해 PDF를 DOCX로 변환하는 서버 의존 도구입니다.
  Sources: Utillica file conversion API retention policy
- [Word to PDF — 서버 파일 변환](https://utillica.com/ko/word-to-pdf): Word to PDF는 파일을 /api 변환 job으로 업로드해 DOC/DOCX를 PDF로 변환하는 서버 의존 도구입니다.
  Sources: Utillica file conversion API retention policy
- [PDF to Excel — 서버 파일 변환](https://utillica.com/ko/pdf-to-excel): PDF to Excel는 파일을 /api 변환 job으로 업로드해 PDF를 XLSX로 변환하는 서버 의존 도구입니다.
  Sources: Utillica file conversion API retention policy
- [PPT to PDF — 서버 파일 변환](https://utillica.com/ko/ppt-to-pdf): PPT to PDF는 파일을 /api 변환 job으로 업로드해 PPT/PPTX를 PDF로 변환하는 서버 의존 도구입니다.
  Sources: Utillica file conversion API retention policy
- [MP4 to MP3 — 서버 파일 변환](https://utillica.com/ko/mp4-to-mp3): MP4 to MP3는 파일을 /api 변환 job으로 업로드해 MP4에서 MP3 오디오를 추출하는 서버 의존 도구입니다.
  Sources: Utillica file conversion API retention policy
- [EPUB to PDF — 서버 파일 변환](https://utillica.com/ko/epub-to-pdf): EPUB to PDF는 파일을 /api 변환 job으로 업로드해 EPUB 전자책을 PDF로 변환하는 서버 의존 도구입니다.
  Sources: Utillica file conversion API retention policy
- [ZIP Extract — 서버 파일 변환](https://utillica.com/ko/zip-extract): ZIP Extract는 파일을 /api 변환 job으로 업로드해 ZIP 파일을 검사하고 추출 결과를 만드는 서버 의존 도구입니다.
  Sources: Utillica file conversion API retention policy
- [PDF Compress — 서버 파일 변환](https://utillica.com/ko/pdf-compress): PDF Compress는 파일을 /api 변환 job으로 업로드해 PDF 압축 결과를 생성하는 서버 의존 도구입니다.
  Sources: Utillica file conversion API retention policy
- [favicon 생성기 — 브라우저 이미지 에셋 도구](https://utillica.com/ko/favicon-generator): favicon 생성기는 이미지에서 16, 32, 48px favicon PNG를 생성하는 브라우저 기반 이미지 에셋 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [app icon 사이즈 생성 — 브라우저 이미지 에셋 도구](https://utillica.com/ko/app-icon-generator): app icon 사이즈 생성는 이미지에서 180, 192, 512px 앱 아이콘 PNG를 생성하는 브라우저 기반 이미지 에셋 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [SVG 최적화 — 브라우저 이미지 에셋 도구](https://utillica.com/ko/svg-optimizer): SVG 최적화는 SVG 텍스트의 주석과 불필요한 공백을 정리하는 브라우저 기반 이미지 에셋 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [SVG to PNG — 브라우저 이미지 에셋 도구](https://utillica.com/ko/svg-to-png): SVG to PNG는 SVG 텍스트를 PNG 이미지로 렌더링하는 브라우저 기반 이미지 에셋 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [소셜 포스트 이미지 — 소셜 이미지 생성기](https://utillica.com/ko/tweet-to-image): 소셜 포스트 이미지는 텍스트 기반 generic social post 이미지를 만드는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [Meme Generator — 소셜 이미지 생성기](https://utillica.com/ko/meme-generator): Meme Generator는 이미지와 caption 기반 meme PNG를 만드는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs
- [노이즈·필름그레인 생성기 — 브라우저 이미지 생성 도구](https://utillica.com/ko/noise-filmgrain-generator): 노이즈·필름그레인 생성기는 지정한 크기와 강도로 PNG 노이즈 텍스처를 생성하는 도구 브라우저 기반 이미지·에셋 생성 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [SVG 파비콘 이모지 생성기 — 브라우저 이미지 생성 도구](https://utillica.com/ko/svg-emoji-favicon-generator): SVG 파비콘 이모지 생성기는 이모지와 배경색으로 SVG favicon 파일을 생성하는 도구 브라우저 기반 이미지·에셋 생성 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [스프라이트 시트 생성기 — 브라우저 이미지 생성 도구](https://utillica.com/ko/sprite-sheet-generator): 스프라이트 시트 생성기는 문자·이모지 목록을 격자형 SVG 스프라이트 시트로 생성하는 도구 브라우저 기반 이미지·에셋 생성 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [증명사진 규격 크롭 — 브라우저 이미지 편집 도구](https://utillica.com/ko/id-photo-cropper): 증명사진 규격 크롭는 증명사진·여권사진 규격 픽셀로 중앙 크롭 이미지를 만드는 도구 순수 클라이언트 이미지 편집 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; MDN Web Docs: Canvas API
- [이미지 일괄 변환·리사이즈 — 브라우저 이미지 편집 도구](https://utillica.com/ko/image-batch-resize-converter): 이미지 일괄 변환·리사이즈는 여러 이미지의 최대 크기와 출력 포맷을 한 번에 맞추는 도구 순수 클라이언트 이미지 편집 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; MDN Web Docs: Canvas API
- [이미지 격자 분할기 — 브라우저 이미지 편집 도구](https://utillica.com/ko/image-grid-splitter): 이미지 격자 분할기는 이미지를 행·열 격자 타일 PNG로 나누는 도구 순수 클라이언트 이미지 편집 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; MDN Web Docs: Canvas API
- [사진 EXIF 지도 제거 확인기 — 브라우저 이미지 편집 도구](https://utillica.com/ko/exif-gps-strip-checker): 사진 EXIF 지도 제거 확인기는 JPEG EXIF GPS 태그 존재를 확인하고 메타데이터 없는 재저장 파일을 만드는 도구 순수 클라이언트 이미지 편집 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; MDN Web Docs: Canvas API
- [음성 파일 파형 이미지 생성 — 브라우저 미디어 이미지 도구](https://utillica.com/ko/audio-waveform-image): 음성 파일 파형 이미지 생성는 오디오 파일에서 PNG 파형 이미지를 생성하는 도구 순수 클라이언트 미디어 이미지 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; MDN Web Docs: Web Audio API
- [GIF 프레임 분해·재조립 — 브라우저 이미지 도구](https://utillica.com/ko/gif-frame-extractor-rebuilder): GIF 프레임 분해·재조립은 animated GIF를 브라우저에서 디코드해 각 프레임 PNG와 재조립 GIF를 만드는 도구입니다.
  Sources: MDN Web Docs: Client-side web APIs; GIF89a Specification
- [PDF 합치기 — 여러 PDF 병합 (브라우저 처리)](https://utillica.com/ko/pdf-merge): PDF 합치기는 여러 PDF 파일의 페이지를 지정한 순서 그대로 복사해 하나의 PDF 문서로 만드는 브라우저 기반 PDF 도구입니다.
  Sources: ISO 32000-2 — Portable Document Format (PDF 2.0); pdf-lib — Create and modify PDF documents in JavaScript; MDN Web Docs: Client-side web APIs
- [PDF 분할 — 페이지 범위로 나누기 (브라우저 처리)](https://utillica.com/ko/pdf-split): PDF 분할은 하나의 PDF에서 지정한 페이지 범위마다 별도의 PDF 파일을 만들어 나누는 브라우저 기반 PDF 도구입니다.
  Sources: ISO 32000-2 — Portable Document Format (PDF 2.0); pdf-lib — Create and modify PDF documents in JavaScript; MDN Web Docs: Client-side web APIs
- [PDF 회전 — 90/180/270도 페이지 회전 (브라우저 처리)](https://utillica.com/ko/pdf-rotate): PDF 회전은 전체 페이지 또는 지정한 페이지의 회전값을 90, 180, 270도 단위로 바꿔 새 PDF로 저장하는 브라우저 기반 PDF 도구입니다.
  Sources: ISO 32000-2 — Portable Document Format (PDF 2.0); pdf-lib — Create and modify PDF documents in JavaScript; MDN Web Docs: Client-side web APIs
- [PDF 페이지 추출·삭제 — 원하는 페이지만 새 PDF로 (브라우저 처리)](https://utillica.com/ko/pdf-extract-pages): PDF 페이지 추출은 지정한 페이지만 복사해 새 PDF를 만들거나, 지정한 페이지를 제외한 나머지로 새 PDF를 만드는 브라우저 기반 PDF 도구입니다.
  Sources: ISO 32000-2 — Portable Document Format (PDF 2.0); pdf-lib — Create and modify PDF documents in JavaScript; MDN Web Docs: Client-side web APIs
- [PDF 쪽번호 넣기 — 위치·시작 번호·형식 지정 (브라우저 처리)](https://utillica.com/ko/pdf-page-numbers): PDF 쪽번호 넣기는 각 페이지의 지정한 위치에 시작 번호부터 이어지는 쪽번호를 새겨 새 PDF로 저장하는 브라우저 기반 PDF 도구입니다.
  Sources: ISO 32000-2 — Portable Document Format (PDF 2.0); pdf-lib — Create and modify PDF documents in JavaScript; MDN Web Docs: Client-side web APIs
- [PDF 워터마크 — 텍스트 워터마크 넣기 (브라우저 처리)](https://utillica.com/ko/pdf-watermark): PDF 워터마크는 입력한 텍스트를 투명도·크기·방향을 지정해 모든 페이지 중앙에 새겨 새 PDF로 저장하는 브라우저 기반 PDF 도구입니다.
  Sources: ISO 32000-2 — Portable Document Format (PDF 2.0); pdf-lib — Create and modify PDF documents in JavaScript; MDN Web Docs: Client-side web APIs
- [JPG PDF 변환 — 이미지 여러 장을 PDF로 (브라우저 처리)](https://utillica.com/ko/jpg-to-pdf): JPG PDF 변환기는 JPG·PNG 이미지 여러 장을 지정한 순서대로 한 장씩 페이지에 배치해 하나의 PDF 파일로 만드는 브라우저 기반 변환 도구입니다.
  Sources: ISO 32000-2 — Portable Document Format (PDF 2.0); pdf-lib — Create and modify PDF documents in JavaScript; MDN Web Docs: Client-side web APIs
- [PDF JPG 변환 — 페이지별 이미지 저장 (브라우저 처리)](https://utillica.com/ko/pdf-to-jpg): PDF JPG 변환기는 PDF의 각 페이지를 브라우저에서 렌더링해 페이지별 JPG 또는 PNG 이미지 파일로 저장하는 변환 도구입니다.
  Sources: ISO 32000-2 — Portable Document Format (PDF 2.0); PDF.js — PDF rendering in JavaScript; MDN Web Docs: Client-side web APIs
- [PDF 페이지 순서 재배열 — 브라우저 PDF 편집](https://utillica.com/ko/pdf-reorder-pages): PDF 페이지 순서 재배열는 입력한 순서대로 PDF 페이지를 복사해 새 PDF로 만드는 도구 브라우저 기반 PDF 편집 도구입니다.
  Sources: ISO 32000-2 — Portable Document Format (PDF 2.0); pdf-lib — Create and modify PDF documents in JavaScript; MDN Web Docs: Client-side web APIs
- [PDF 폼 채우기 — 브라우저 PDF 편집](https://utillica.com/ko/pdf-form-filler): PDF 폼 채우기는 AcroForm 텍스트·체크박스·선택 필드를 key=value 입력으로 채우는 도구 브라우저 기반 PDF 편집 도구입니다.
  Sources: ISO 32000-2 — Portable Document Format (PDF 2.0); pdf-lib — Create and modify PDF documents in JavaScript; MDN Web Docs: Client-side web APIs
- [PDF 서명 삽입 — 브라우저 PDF 편집](https://utillica.com/ko/pdf-signature-inserter): PDF 서명 삽입는 서명 텍스트와 선을 지정한 페이지 좌표에 시각적으로 삽입하는 도구 브라우저 기반 PDF 편집 도구입니다.
  Sources: ISO 32000-2 — Portable Document Format (PDF 2.0); pdf-lib — Create and modify PDF documents in JavaScript; MDN Web Docs: Client-side web APIs

## English (en)

## Unit Converter

Category hub: https://utillica.com/en/category/unit-converter

- [millimeter to centimeter (mm → cm)](https://utillica.com/en/mm-to-cm): Converting millimeter (mm) to centimeter (cm), 1mm is about 0.1cm.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [millimeter to inch (mm → in)](https://utillica.com/en/mm-to-inch): Converting millimeter (mm) to inch (in), 1mm is about 0.03937in.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [centimeter to millimeter (cm → mm)](https://utillica.com/en/cm-to-mm): Converting centimeter (cm) to millimeter (mm), 1cm is about 10mm.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [centimeter to meter (cm → m)](https://utillica.com/en/cm-to-m): Converting centimeter (cm) to meter (m), 1cm is about 0.01m.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [centimeter to inch (cm → in)](https://utillica.com/en/cm-to-inch): Converting centimeter (cm) to inch (in), 1cm is about 0.393701in.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [meter to centimeter (m → cm)](https://utillica.com/en/m-to-cm): Converting meter (m) to centimeter (cm), 1m is about 100cm.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [meter to foot (m → ft)](https://utillica.com/en/m-to-ft): Converting meter (m) to foot (ft), 1m is about 3.28084ft.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [meter to yard (m → yd)](https://utillica.com/en/m-to-yard): Converting meter (m) to yard (yd), 1m is about 1.093613yd.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [kilometer to mile (km → mi)](https://utillica.com/en/km-to-mile): Converting kilometer (km) to mile (mi), 1km is about 0.621371mi.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [kilometer to nautical mile (km → nmi)](https://utillica.com/en/km-to-nmi): Converting kilometer (km) to nautical mile (nmi), 1km is about 0.539957nmi.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [inch to millimeter (in → mm)](https://utillica.com/en/inch-to-mm): Converting inch (in) to millimeter (mm), 1in is about 25.4mm.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [inch to centimeter (in → cm)](https://utillica.com/en/inch-to-cm): Converting inch (in) to centimeter (cm), 1in is about 2.54cm.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [foot to meter (ft → m)](https://utillica.com/en/ft-to-m): Converting foot (ft) to meter (m), 1ft is about 0.3048m.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [yard to meter (yd → m)](https://utillica.com/en/yard-to-m): Converting yard (yd) to meter (m), 1yd is about 0.9144m.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [mile to kilometer (mi → km)](https://utillica.com/en/mile-to-km): Converting mile (mi) to kilometer (km), 1mi is about 1.609344km.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [nautical mile to kilometer (nmi → km)](https://utillica.com/en/nmi-to-km): Converting nautical mile (nmi) to kilometer (km), 1nmi is about 1.852km.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [gram to ounce (g → oz)](https://utillica.com/en/g-to-oz): Converting gram (g) to ounce (oz), 1g is about 0.035274oz.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [Grams to Don (g → 돈) — Korean Gold Weight Unit](https://utillica.com/en/g-to-don): Converting grams to don, 3.75g equals exactly 1 don and 1g is about 0.266667 don.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [kilogram to gram (kg → g)](https://utillica.com/en/kg-to-g): Converting kilogram (kg) to gram (g), 1kg is about 1,000g.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [kilogram to tonne (kg → t)](https://utillica.com/en/kg-to-ton): Converting kilogram (kg) to tonne (t), 1kg is about 0.001t.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [kilogram to pound (kg → lb)](https://utillica.com/en/kg-to-lb): Converting kilogram (kg) to pound (lb), 1kg is about 2.204624lb.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [kilogram to stone (kg → st)](https://utillica.com/en/kg-to-stone): Converting kilogram (kg) to stone (st), 1kg is about 0.157473st.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [tonne to kilogram (t → kg)](https://utillica.com/en/ton-to-kg): Converting tonne (t) to kilogram (kg), 1t is about 1,000kg.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [ounce to gram (oz → g)](https://utillica.com/en/oz-to-g): Converting ounce (oz) to gram (g), 1oz is about 28.3495g.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [pound to kilogram (lb → kg)](https://utillica.com/en/lb-to-kg): Converting pound (lb) to kilogram (kg), 1lb is about 0.453592kg.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [stone to kilogram (st → kg)](https://utillica.com/en/stone-to-kg): Converting stone (st) to kilogram (kg), 1st is about 6.35029kg.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [Don to Grams (돈 → g) — Korean Gold Weight Unit](https://utillica.com/en/don-to-g): The don is a traditional Korean weight unit for gold and precious metals; 1 don equals exactly 3.75 grams.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [Celsius to Fahrenheit (°C → °F)](https://utillica.com/en/c-to-f): Celsius (°C) and Fahrenheit (°F) are different temperature scales; °C can be converted to °F.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [Celsius to Kelvin (°C → K)](https://utillica.com/en/c-to-k): Celsius (°C) and Kelvin (K) are different temperature scales; °C can be converted to K.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [Fahrenheit to Celsius (°F → °C)](https://utillica.com/en/f-to-c): Fahrenheit (°F) and Celsius (°C) are different temperature scales; °F can be converted to °C.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [Kelvin to Celsius (K → °C)](https://utillica.com/en/k-to-c): Kelvin (K) and Celsius (°C) are different temperature scales; K can be converted to °C.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [Square Meters to Pyeong (m² → 평) — Korean Area Converter](https://utillica.com/en/m2-to-pyeong): This conversion turns square meters into Korean pyeong; 1 m² equals exactly 0.3025 pyeong (121/400).
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units; Housing measurement guide: pyeong and square metres
- [square meter to acre (m² → ac)](https://utillica.com/en/m2-to-acre): Converting square meter (m²) to acre (ac), 1m² is about 0.000247ac.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units; Housing measurement guide: pyeong and square metres
- [square meter to hectare (m² → ha)](https://utillica.com/en/m2-to-ha): Converting square meter (m²) to hectare (ha), 1m² is about 0.0001ha.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units; Housing measurement guide: pyeong and square metres
- [square meter to square foot (m² → ft²)](https://utillica.com/en/m2-to-ft2): Converting square meter (m²) to square foot (ft²), 1m² is about 10.763915ft².
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units; Housing measurement guide: pyeong and square metres
- [Pyeong to Square Meters (평 → m²) — Korean Apartment Size](https://utillica.com/en/pyeong-to-m2): The pyeong is a traditional Korean area unit still used for real estate; 1 pyeong equals 400/121 m², about 3.3058 m².
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units; Housing measurement guide: pyeong and square metres
- [acre to square meter (ac → m²)](https://utillica.com/en/acre-to-m2): Converting acre (ac) to square meter (m²), 1ac is about 4,046.86m².
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units; Housing measurement guide: pyeong and square metres
- [hectare to square meter (ha → m²)](https://utillica.com/en/ha-to-m2): Converting hectare (ha) to square meter (m²), 1ha is about 10,000m².
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units; Housing measurement guide: pyeong and square metres
- [square foot to square meter (ft² → m²)](https://utillica.com/en/ft2-to-m2): Converting square foot (ft²) to square meter (m²), 1ft² is about 0.092903m².
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units; Housing measurement guide: pyeong and square metres
- [Milliliters to Cups (mL → cup) — US Legal Cup 240mL](https://utillica.com/en/ml-to-cup): Converting milliliter (mL) to cup (cup), 1mL is about 0.004167cup.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [Milliliters to Tablespoons (mL → tbsp) — US Tablespoon](https://utillica.com/en/ml-to-tbsp): Converting milliliter (mL) to tablespoon (tbsp), 1mL is about 0.067628tbsp.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [Milliliters to Teaspoons (mL → tsp) — US Teaspoon](https://utillica.com/en/ml-to-tsp): Converting milliliter (mL) to teaspoon (tsp), 1mL is about 0.202884tsp.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [milliliter to fluid ounce (mL → fl oz)](https://utillica.com/en/ml-to-fl-oz): Converting milliliter (mL) to fluid ounce (fl oz), 1mL is about 0.033814fl oz.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [liter to gallon (L → gal)](https://utillica.com/en/l-to-gallon): Converting liter (L) to gallon (gal), 1L is about 0.264172gal.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [gallon to liter (gal → L)](https://utillica.com/en/gallon-to-l): Converting gallon (gal) to liter (L), 1gal is about 3.785412L.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [Cups to Milliliters (cup → mL) — US Legal Cup 240mL](https://utillica.com/en/cup-to-ml): Converting cup (cup) to milliliter (mL), 1cup is about 240mL.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [Tablespoons to Milliliters (tbsp → mL) — US Tablespoon](https://utillica.com/en/tbsp-to-ml): Converting tablespoon (tbsp) to milliliter (mL), 1tbsp is about 14.7868mL.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [Teaspoons to Milliliters (tsp → mL) — US Teaspoon](https://utillica.com/en/tsp-to-ml): Converting teaspoon (tsp) to milliliter (mL), 1tsp is about 4.92892mL.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [fluid ounce to milliliter (fl oz → mL)](https://utillica.com/en/fl-oz-to-ml): Converting fluid ounce (fl oz) to milliliter (mL), 1fl oz is about 29.5735mL.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [meter/second to kilometer/hour (m/s → km/h)](https://utillica.com/en/m-s-to-km-h): Converting meters per second to kilometers per hour, 1m/s is exactly 3.6km/h.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [kilometer/hour to meter/second (km/h → m/s)](https://utillica.com/en/km-h-to-m-s): Converting kilometer/hour (km/h) to meter/second (m/s), 1km/h is about 0.277778m/s.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [kilometer/hour to mile/hour (km/h → mph)](https://utillica.com/en/km-h-to-mph): Converting kilometer/hour (km/h) to mile/hour (mph), 1km/h is about 0.621372mph.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [kilometer/hour to knot (km/h → kn)](https://utillica.com/en/km-h-to-knot): Converting kilometer/hour (km/h) to knot (kn), 1km/h is about 0.539958kn.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [mile/hour to kilometer/hour (mph → km/h)](https://utillica.com/en/mph-to-km-h): Converting mile/hour (mph) to kilometer/hour (km/h), 1mph is about 1.609343km/h.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [knot to kilometer/hour (kn → km/h)](https://utillica.com/en/knot-to-km-h): Converting knots (kn) to kilometers per hour, 1 knot is exactly 1.852km/h.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [megabyte to gigabyte (MB → GB)](https://utillica.com/en/mb-to-gb): Converting megabyte (MB) to gigabyte (GB), 1MB is about 0.001GB.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [gigabyte to megabyte (GB → MB)](https://utillica.com/en/gb-to-mb): Converting gigabyte (GB) to megabyte (MB), 1GB is about 1,000MB.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [kilopascal to bar (kPa → bar)](https://utillica.com/en/kpa-to-bar): Converting kilopascal (kPa) to bar (bar), 1kPa is about 0.01bar.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [bar to kilopascal (bar → kPa)](https://utillica.com/en/bar-to-kpa): Converting bar (bar) to kilopascal (kPa), 1bar is about 100kPa.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [bar to psi (bar → psi)](https://utillica.com/en/bar-to-psi): Converting bar (bar) to psi (psi), 1bar is about 14.503774psi.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [atmosphere to mmHg (atm → mmHg)](https://utillica.com/en/atm-to-mmhg): Converting atmospheres to millimeters of mercury, 1atm is exactly 760mmHg by the standard-atmosphere definition.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [psi to bar (psi → bar)](https://utillica.com/en/psi-to-bar): Converting psi (psi) to bar (bar), 1psi is about 0.068948bar.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [mmHg to atmosphere (mmHg → atm)](https://utillica.com/en/mmhg-to-atm): Converting mmHg (mmHg) to atmosphere (atm), 1mmHg is about 0.001316atm.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [kilojoule to kilocalorie (kJ → kcal)](https://utillica.com/en/kj-to-kcal): Converting kilojoule (kJ) to kilocalorie (kcal), 1kJ is about 0.239006kcal.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [kilocalorie to kilojoule (kcal → kJ)](https://utillica.com/en/kcal-to-kj): Converting kilocalorie (kcal) to kilojoule (kJ), 1kcal is about 4.184kJ.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [watt to horsepower (W → hp)](https://utillica.com/en/w-to-hp): Converting watt (W) to horsepower (hp), 1W is about 0.001341hp.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [kilowatt to horsepower (kW → hp)](https://utillica.com/en/kw-to-hp): Converting kilowatt (kW) to horsepower (hp), 1kW is about 1.341022hp.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [horsepower to watt (hp → W)](https://utillica.com/en/hp-to-w): Converting horsepower (hp) to watt (W), 1hp is about 745.699872W.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [horsepower to kilowatt (hp → kW)](https://utillica.com/en/hp-to-kw): Converting horsepower (hp) to kilowatt (kW), 1hp is about 0.7457kW.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [newton to kilogram-force (N → kgf)](https://utillica.com/en/n-to-kgf): Converting newton (N) to kilogram-force (kgf), 1N is about 0.101972kgf.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [newton to pound-force (N → lbf)](https://utillica.com/en/n-to-lbf): Converting newton (N) to pound-force (lbf), 1N is about 0.224809lbf.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [kilogram-force to newton (kgf → N)](https://utillica.com/en/kgf-to-n): Converting kilogram-force (kgf) to newton (N), 1kgf is about 9.80665N.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [pound-force to newton (lbf → N)](https://utillica.com/en/lbf-to-n): Converting pound-force (lbf) to newton (N), 1lbf is about 4.448222N.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [degree to radian (° → rad)](https://utillica.com/en/deg-to-rad): Converting degree (°) to radian (rad), 1° is about 0.017453rad.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [radian to degree (rad → °)](https://utillica.com/en/rad-to-deg): Converting radian (rad) to degree (°), 1rad is about 57.29578°.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [kilometer per liter to liters per 100km (km/L → L/100km)](https://utillica.com/en/km-l-to-l-100km): To convert km/L (distance per liter) to L/100km (fuel used per 100km), divide 100 by the km/L value.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [kilometer per liter to miles per gallon (US) (km/L → mpg)](https://utillica.com/en/km-l-to-mpg): Converting kilometer per liter (km/L) to miles per gallon (US) (mpg), 1km/L is about 2.352146mpg.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [liters per 100km to kilometer per liter (L/100km → km/L)](https://utillica.com/en/l-100km-to-km-l): To convert L/100km (fuel used per 100km) to km/L (distance per liter), divide 100 by the L/100km value.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [miles per gallon (US) to kilometer per liter (mpg → km/L)](https://utillica.com/en/mpg-to-km-l): Converting miles per gallon (US) (mpg) to kilometer per liter (km/L), 1mpg is about 0.425144km/L.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [megabit per second to megabyte per second (Mbps → MB/s)](https://utillica.com/en/mbps-to-mb-s): Converting megabit per second (Mbps) to megabyte per second (MB/s), 1Mbps is about 0.125MB/s.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [megabyte per second to megabit per second (MB/s → Mbps)](https://utillica.com/en/mb-s-to-mbps): Converting megabyte per second (MB/s) to megabit per second (Mbps), 1MB/s is about 8Mbps.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units

## Calculator

Category hub: https://utillica.com/en/category/calculator

- [BMI Calculator — Body Mass Index](https://utillica.com/en/bmi): A BMI calculator computes body mass index (kg/m²) from height and weight to classify weight status.
  Sources: Adult BMI categories; Appropriate body-mass index for Asian populations
- [Percentage Calculator — X is what % of Y](https://utillica.com/en/percentage): A percentage calculator finds the ratio (%) from a part (X) and a whole (Y): X is what percent of Y.
  Sources: Percent
- [Discount Calculator — Sale Price from Original Price](https://utillica.com/en/discount): A discount calculator finds the discount amount and final sale price from an original price and discount rate.
  Sources: Percent
- [VAT Calculator — 10% Tax from Net Amount](https://utillica.com/en/vat): A VAT calculator applies a tax rate to a net amount to find VAT and the gross amount.
  Sources: Percent
- [Average Calculator — Mean from Sum and Count](https://utillica.com/en/average): An average calculator finds the arithmetic mean by dividing a sum by the number of items.
  Sources: MDN Web Docs: Client-side web APIs
- [Weighted Average Calculator](https://utillica.com/en/weighted-average): A weighted average calculator finds an average that accounts for the importance or weight of each value.
  Sources: MDN Web Docs: Client-side web APIs
- [Ratio Calculator — Simplify A:B](https://utillica.com/en/ratio): A ratio calculator reduces two numbers to the simplest A:B form using their greatest common divisor.
  Sources: MDN Web Docs: Client-side web APIs
- [Rule of Three Calculator — Find X from Three Values](https://utillica.com/en/rule-of-three): A rule of three calculator finds the unknown X in A:B = C:X from the three known values A, B, and C.
  Sources: MDN Web Docs: Client-side web APIs
- [Exponent Calculator — Base and Power](https://utillica.com/en/exponent): An exponent calculator finds aⁿ, the value of multiplying a base by itself a specified number of times.
  Sources: MDN Web Docs: Client-side web APIs
- [Square Root Calculator](https://utillica.com/en/square-root): A square root calculator finds the real value that produces the input when squared.
  Sources: MDN Web Docs: Client-side web APIs
- [Factorial Calculator — Calculate n!](https://utillica.com/en/factorial): A factorial calculator finds n!, the product of all positive integers from n down to 1.
  Sources: MDN Web Docs: Client-side web APIs
- [Permutation and Combination Calculator — nPr nCr](https://utillica.com/en/permutation-combination): A permutation and combination calculator finds nPr when order matters and nCr when order does not matter.
  Sources: MDN Web Docs: Client-side web APIs
- [GCD and LCM Calculator](https://utillica.com/en/gcd-lcm): A GCD and LCM calculator finds the greatest common divisor and least common multiple of two integers.
  Sources: MDN Web Docs: Client-side web APIs
- [Tip Calculator — Split Tip and Total](https://utillica.com/en/tip): A tip calculator finds the tip, total bill, and per-person amount from a bill, tip rate, and number of people.
  Sources: Percent
- [Compound Interest Calculator](https://utillica.com/en/compound-interest): A compound interest calculator estimates future value when interest earns additional interest over time.
  Sources: Percent
- [Loan Payment Calculator — Monthly Payment](https://utillica.com/en/loan-interest): A loan payment calculator estimates equal monthly payments and total paid for an amortizing loan.
  Sources: Percent
- [Break-even Calculator — BEP Units](https://utillica.com/en/break-even): A break-even calculator divides fixed cost by unit contribution margin to estimate required sales units.
  Sources: MDN Web Docs: Client-side web APIs
- [GPA Converter — Korea Life Calculator](https://utillica.com/en/gpa): GPA Converter is a browser-based Korea life calculator that converts a 100-point score to a 4.5-scale gpa.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Grade Point Calculator — Korea Life Calculator](https://utillica.com/en/grade): Grade Point Calculator is a browser-based Korea life calculator that calculates average grade points from total quality points and credits.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Shoe Size Converter — Korea Life Calculator](https://utillica.com/en/shoe-size): Shoe Size Converter is a browser-based Korea life calculator that converts korean millimeter shoe size to reference us and eu sizes.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Clothing Size Converter — Korea Life Calculator](https://utillica.com/en/clothing-size): Clothing Size Converter is a browser-based Korea life calculator that estimates korean clothing size from chest circumference in centimeters.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Korean Ring Size Converter — Korea Life Calculator](https://utillica.com/en/ring-size): Korean Ring Size Converter is a browser-based Korea life calculator that estimates korean ring size from inner diameter in millimeters.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Weekly Holiday Pay Calculator — Korea Life Calculator](https://utillica.com/en/weekly-holiday-pay): Weekly Holiday Pay Calculator is a browser-based Korea life calculator that calculates weekly holiday pay from hourly wage and weekly scheduled hours.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Hourly Wage Calculator — Korea Life Calculator](https://utillica.com/en/hourly-wage): Hourly Wage Calculator is a browser-based Korea life calculator that calculates hourly wage from monthly pay and monthly work hours.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Severance Pay Calculator — Korea Life Calculator](https://utillica.com/en/severance-pay): Severance Pay Calculator is a browser-based Korea life calculator that estimates severance pay from average daily wage and service days.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Savings Interest Calculator — Korea Life Calculator](https://utillica.com/en/savings): Savings Interest Calculator is a browser-based Korea life calculator that estimates savings maturity amount from monthly deposit, term, and annual rate.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Jeonse to Monthly Rent Converter — Korea Life Calculator](https://utillica.com/en/jeonse-monthly): Jeonse to Monthly Rent Converter is a browser-based Korea life calculator that converts a jeonse deposit gap to monthly rent using an annual conversion rate.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Korean Housing Area Calculator — Korea Life Calculator](https://utillica.com/en/housing-area): Korean Housing Area Calculator is a browser-based Korea life calculator that estimates supply area from exclusive area and exclusive ratio.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Korean Four Insurance Calculator — Korea Life Calculator](https://utillica.com/en/four-insurance): Korean Four Insurance Calculator is a browser-based Korea life calculator that estimates employee-side korean pension, health, long-term care, and employment insurance from monthly pay.
  Sources: 2026 National Pension standard monthly income limits; 2026 National Health Insurance contribution rate; Earned income withholding tax table guide
- [Korean Net Salary Calculator — 2026 Take-Home Pay](https://utillica.com/en/net-salary): Korean Net Salary Calculator is a browser-based Korea life calculator that estimates monthly take-home pay from annual salary, employee insurance, and entered withholding tax.
  Sources: 2026 National Pension standard monthly income limits; 2026 National Health Insurance contribution rate; Earned income withholding tax table guide
- [Korean Car Tax Calculator — Korea Life Calculator](https://utillica.com/en/car-tax): Korean Car Tax Calculator is a browser-based Korea life calculator that estimates annual korean passenger car ownership tax and local education tax from engine size and vehicle age.
  Sources: Passenger car ownership tax rates; Real estate acquisition tax guide; Local Tax Act Enforcement Decree Article 109
- [Korean Acquisition Tax Calculator — Korea Life Calculator](https://utillica.com/en/acquisition-tax): Korean Acquisition Tax Calculator is a browser-based Korea life calculator that estimates basic korean residential acquisition tax and local education tax from purchase price.
  Sources: Passenger car ownership tax rates; Real estate acquisition tax guide; Local Tax Act Enforcement Decree Article 109
- [Korean Property Tax Calculator — Korea Life Calculator](https://utillica.com/en/property-tax): Korean Property Tax Calculator is a browser-based Korea life calculator that estimates korean residential property tax and local education tax from standard value and fair market value ratio.
  Sources: Passenger car ownership tax rates; Real estate acquisition tax guide; Local Tax Act Enforcement Decree Article 109
- [Unemployment Benefit Calculator — Korea HR and Payroll Calculator](https://utillica.com/en/unemployment-benefit): Unemployment Benefit Calculator is a browser-based Korea HR and payroll calculator that estimates daily and total job-seeking benefits from average daily wage, age, and insured period.
  Sources: 2026 minimum wage hourly rate and monthly conversion; Minimum Wage Council annual rates; Employment insurance unemployment benefit simulation guide; 2026 unemployment benefit cap adjustment; Annual paid leave under Labor Standards Act Article 60; Daily worker withholding income tax formula; Personal service business income 3.3% withholding; Parental leave benefit policy; Employment Insurance Act Enforcement Decree Article 95; Maternity leave benefit cap
- [Annual Leave Calculator — Korea HR and Payroll Calculator](https://utillica.com/en/annual-leave): Annual Leave Calculator is a browser-based Korea HR and payroll calculator that estimates earned and remaining annual leave from service months, attendance rate, and used leave.
  Sources: 2026 minimum wage hourly rate and monthly conversion; Minimum Wage Council annual rates; Employment insurance unemployment benefit simulation guide; 2026 unemployment benefit cap adjustment; Annual paid leave under Labor Standards Act Article 60; Daily worker withholding income tax formula; Personal service business income 3.3% withholding; Parental leave benefit policy; Employment Insurance Act Enforcement Decree Article 95; Maternity leave benefit cap
- [Minimum Wage Calculator — Korea HR and Payroll Calculator](https://utillica.com/en/minimum-wage): Minimum Wage Calculator is a browser-based Korea HR and payroll calculator that checks whether hourly or monthly pay meets the 2026 korean minimum wage.
  Sources: 2026 minimum wage hourly rate and monthly conversion; Minimum Wage Council annual rates; Employment insurance unemployment benefit simulation guide; 2026 unemployment benefit cap adjustment; Annual paid leave under Labor Standards Act Article 60; Daily worker withholding income tax formula; Personal service business income 3.3% withholding; Parental leave benefit policy; Employment Insurance Act Enforcement Decree Article 95; Maternity leave benefit cap
- [Daily Worker Tax Calculator — Korea HR and Payroll Calculator](https://utillica.com/en/daily-worker-tax): Daily Worker Tax Calculator is a browser-based Korea HR and payroll calculator that estimates daily worker earned-income withholding from daily pay and work days.
  Sources: 2026 minimum wage hourly rate and monthly conversion; Minimum Wage Council annual rates; Employment insurance unemployment benefit simulation guide; 2026 unemployment benefit cap adjustment; Annual paid leave under Labor Standards Act Article 60; Daily worker withholding income tax formula; Personal service business income 3.3% withholding; Parental leave benefit policy; Employment Insurance Act Enforcement Decree Article 95; Maternity leave benefit cap
- [Freelancer 3.3% Tax Calculator — Korea HR and Payroll Calculator](https://utillica.com/en/freelancer-tax-3-3): Freelancer 3.3% Tax Calculator is a browser-based Korea HR and payroll calculator that calculates 3.3% business-income withholding and net pay.
  Sources: 2026 minimum wage hourly rate and monthly conversion; Minimum Wage Council annual rates; Employment insurance unemployment benefit simulation guide; 2026 unemployment benefit cap adjustment; Annual paid leave under Labor Standards Act Article 60; Daily worker withholding income tax formula; Personal service business income 3.3% withholding; Parental leave benefit policy; Employment Insurance Act Enforcement Decree Article 95; Maternity leave benefit cap
- [Parental Leave Pay Calculator — Korea HR and Payroll Calculator](https://utillica.com/en/parental-leave-pay): Parental Leave Pay Calculator is a browser-based Korea HR and payroll calculator that estimates monthly parental leave benefits from ordinary monthly wage and leave months.
  Sources: 2026 minimum wage hourly rate and monthly conversion; Minimum Wage Council annual rates; Employment insurance unemployment benefit simulation guide; 2026 unemployment benefit cap adjustment; Annual paid leave under Labor Standards Act Article 60; Daily worker withholding income tax formula; Personal service business income 3.3% withholding; Parental leave benefit policy; Employment Insurance Act Enforcement Decree Article 95; Maternity leave benefit cap
- [Maternity Leave Pay Calculator — Korea HR and Payroll Calculator](https://utillica.com/en/maternity-leave-pay): Maternity Leave Pay Calculator is a browser-based Korea HR and payroll calculator that estimates maternity leave pay split by employment insurance and employer gap.
  Sources: 2026 minimum wage hourly rate and monthly conversion; Minimum Wage Council annual rates; Employment insurance unemployment benefit simulation guide; 2026 unemployment benefit cap adjustment; Annual paid leave under Labor Standards Act Article 60; Daily worker withholding income tax formula; Personal service business income 3.3% withholding; Parental leave benefit policy; Employment Insurance Act Enforcement Decree Article 95; Maternity leave benefit cap
- [Inclusive Wage Calculator — Korea HR and Payroll Calculator](https://utillica.com/en/inclusive-wage): Inclusive Wage Calculator is a browser-based Korea HR and payroll calculator that checks minimum wage and fixed overtime basics from base pay and inclusive overtime pay.
  Sources: 2026 minimum wage hourly rate and monthly conversion; Minimum Wage Council annual rates; Employment insurance unemployment benefit simulation guide; 2026 unemployment benefit cap adjustment; Annual paid leave under Labor Standards Act Article 60; Daily worker withholding income tax formula; Personal service business income 3.3% withholding; Parental leave benefit policy; Employment Insurance Act Enforcement Decree Article 95; Maternity leave benefit cap
- [Gift Tax Calculator — Korea Real Estate and Tax Calculator](https://utillica.com/en/gift-tax): Gift Tax Calculator is a browser-based Korean real estate and tax calculator that estimates gift tax from gift amount, relationship, deductions, and generation-skip status.
  Sources: Gift tax deduction table; Gift tax flow and generation-skip surcharge; Inheritance and gift tax rates; Inheritance deduction guide; Comprehensive real estate tax flow; Comprehensive real estate tax overview; Housing brokerage fee table; Real Estate Agent Act Enforcement Rule attached table; Housing deemed rent guide and 2025 deposit interest rate; Comprehensive income tax rate table
- [Inheritance Tax Calculator — Korea Real Estate and Tax Calculator](https://utillica.com/en/inheritance-tax): Inheritance Tax Calculator is a browser-based Korean real estate and tax calculator that estimates inheritance tax from estate value, deductions, and number of heirs.
  Sources: Gift tax deduction table; Gift tax flow and generation-skip surcharge; Inheritance and gift tax rates; Inheritance deduction guide; Comprehensive real estate tax flow; Comprehensive real estate tax overview; Housing brokerage fee table; Real Estate Agent Act Enforcement Rule attached table; Housing deemed rent guide and 2025 deposit interest rate; Comprehensive income tax rate table
- [Comprehensive Real Estate Tax Calculator — Korea Real Estate and Tax Calculator](https://utillica.com/en/comprehensive-real-estate-tax): Comprehensive Real Estate Tax Calculator is a browser-based Korean real estate and tax calculator that estimates comprehensive real estate tax from public price, house count, deduction, and fair-market ratio.
  Sources: Gift tax deduction table; Gift tax flow and generation-skip surcharge; Inheritance and gift tax rates; Inheritance deduction guide; Comprehensive real estate tax flow; Comprehensive real estate tax overview; Housing brokerage fee table; Real Estate Agent Act Enforcement Rule attached table; Housing deemed rent guide and 2025 deposit interest rate; Comprehensive income tax rate table
- [Brokerage Fee Calculator — Korea Real Estate and Tax Calculator](https://utillica.com/en/brokerage-fee): Brokerage Fee Calculator is a browser-based Korean real estate and tax calculator that calculates maximum housing brokerage fee and vat from transaction type and amount.
  Sources: Gift tax deduction table; Gift tax flow and generation-skip surcharge; Inheritance and gift tax rates; Inheritance deduction guide; Comprehensive real estate tax flow; Comprehensive real estate tax overview; Housing brokerage fee table; Real Estate Agent Act Enforcement Rule attached table; Housing deemed rent guide and 2025 deposit interest rate; Comprehensive income tax rate table
- [National Housing Bond Calculator — Korea Real Estate and Tax Calculator](https://utillica.com/en/national-housing-bond): National Housing Bond Calculator is a browser-based Korean real estate and tax calculator that calculates bond purchase and immediate-sale cost from basis amount, purchase rate, and discount rate.
  Sources: Gift tax deduction table; Gift tax flow and generation-skip surcharge; Inheritance and gift tax rates; Inheritance deduction guide; Comprehensive real estate tax flow; Comprehensive real estate tax overview; Housing brokerage fee table; Real Estate Agent Act Enforcement Rule attached table; Housing deemed rent guide and 2025 deposit interest rate; Comprehensive income tax rate table
- [DSR/DTI/LTV Calculator — Korea Real Estate and Tax Calculator](https://utillica.com/en/dsr-dti-ltv): DSR/DTI/LTV Calculator is a browser-based Korean real estate and tax calculator that calculates loan ratios and reference limits from income, debt payments, collateral, and loan amount.
  Sources: Gift tax deduction table; Gift tax flow and generation-skip surcharge; Inheritance and gift tax rates; Inheritance deduction guide; Comprehensive real estate tax flow; Comprehensive real estate tax overview; Housing brokerage fee table; Real Estate Agent Act Enforcement Rule attached table; Housing deemed rent guide and 2025 deposit interest rate; Comprehensive income tax rate table
- [Rental Yield Calculator — Korea Real Estate and Tax Calculator](https://utillica.com/en/rental-yield): Rental Yield Calculator is a browser-based Korean real estate and tax calculator that calculates gross and net rental yield from purchase price, deposit, rent, and costs.
  Sources: Gift tax deduction table; Gift tax flow and generation-skip surcharge; Inheritance and gift tax rates; Inheritance deduction guide; Comprehensive real estate tax flow; Comprehensive real estate tax overview; Housing brokerage fee table; Real Estate Agent Act Enforcement Rule attached table; Housing deemed rent guide and 2025 deposit interest rate; Comprehensive income tax rate table
- [Deemed Rent Calculator — Korea Real Estate and Tax Calculator](https://utillica.com/en/deemed-rent): Deemed Rent Calculator is a browser-based Korean real estate and tax calculator that estimates deemed rental income from deposits, deduction, and deposit interest rate.
  Sources: Gift tax deduction table; Gift tax flow and generation-skip surcharge; Inheritance and gift tax rates; Inheritance deduction guide; Comprehensive real estate tax flow; Comprehensive real estate tax overview; Housing brokerage fee table; Real Estate Agent Act Enforcement Rule attached table; Housing deemed rent guide and 2025 deposit interest rate; Comprehensive income tax rate table
- [Year-End Tax Refund Calculator — Korea Real Estate and Tax Calculator](https://utillica.com/en/year-end-tax-refund): Year-End Tax Refund Calculator is a browser-based Korean real estate and tax calculator that estimates determined tax and refund from gross salary, withholding, deductions, and credits.
  Sources: Gift tax deduction table; Gift tax flow and generation-skip surcharge; Inheritance and gift tax rates; Inheritance deduction guide; Comprehensive real estate tax flow; Comprehensive real estate tax overview; Housing brokerage fee table; Real Estate Agent Act Enforcement Rule attached table; Housing deemed rent guide and 2025 deposit interest rate; Comprehensive income tax rate table
- [Comprehensive Income Tax Calculator — Korea Real Estate and Tax Calculator](https://utillica.com/en/comprehensive-income-tax): Comprehensive Income Tax Calculator is a browser-based Korean real estate and tax calculator that estimates comprehensive income tax from income, expenses, deductions, and tax credits.
  Sources: Gift tax deduction table; Gift tax flow and generation-skip surcharge; Inheritance and gift tax rates; Inheritance deduction guide; Comprehensive real estate tax flow; Comprehensive real estate tax overview; Housing brokerage fee table; Real Estate Agent Act Enforcement Rule attached table; Housing deemed rent guide and 2025 deposit interest rate; Comprehensive income tax rate table
- [Fraction Calculator — Operations and Simplification](https://utillica.com/en/fraction): A fraction calculator performs arithmetic on two fractions and simplifies the result to lowest terms.
  Sources: MDN Web Docs: Client-side web APIs
- [Prime Checker — Test Whether an Integer Is Prime](https://utillica.com/en/prime-checker): A prime checker tests whether an integer is prime, meaning it has only 1 and itself as divisors.
  Sources: MDN Web Docs: Client-side web APIs
- [Prime Factorization Calculator](https://utillica.com/en/prime-factorization): A prime factorization calculator decomposes an integer into a product of prime numbers.
  Sources: MDN Web Docs: Client-side web APIs
- [Quadratic Equation Calculator — Quadratic Formula](https://utillica.com/en/quadratic): A quadratic equation calculator finds the discriminant and roots of ax²+bx+c=0 from coefficients a, b, and c.
  Sources: MDN Web Docs: Client-side web APIs
- [Standard Deviation Calculator — Population Standard Deviation](https://utillica.com/en/standard-deviation): A standard deviation calculator measures how spread out numbers are from their mean.
  Sources: MDN Web Docs: Client-side web APIs
- [Median Calculator — Middle Value of a Number List](https://utillica.com/en/median): A median calculator finds the middle value after sorting a list of numbers.
  Sources: MDN Web Docs: Client-side web APIs
- [Percentile Calculator — pth Percentile Value](https://utillica.com/en/percentile): A percentile calculator finds the value at a specified percentile position in sorted data.
  Sources: MDN Web Docs: Client-side web APIs
- [Circle Area Calculator — Area from Radius](https://utillica.com/en/circle-area): A circle area calculator applies πr² to find the area of a circle from radius r.
  Sources: MDN Web Docs: Client-side web APIs
- [Triangle Area Calculator — Base and Height](https://utillica.com/en/triangle-area): A triangle area calculator multiplies base by height and divides by 2 to find triangle area.
  Sources: MDN Web Docs: Client-side web APIs
- [Rectangle Area Calculator — Width and Height](https://utillica.com/en/rectangle-area): A rectangle area calculator multiplies width by height to find rectangular area.
  Sources: MDN Web Docs: Client-side web APIs
- [Sphere Volume Calculator — Volume from Radius](https://utillica.com/en/sphere-volume): A sphere volume calculator applies 4/3πr³ to find sphere volume from radius r.
  Sources: MDN Web Docs: Client-side web APIs
- [Cylinder Volume Calculator — Radius and Height](https://utillica.com/en/cylinder-volume): A cylinder volume calculator multiplies the circular base area πr² by height h to find cylinder volume.
  Sources: MDN Web Docs: Client-side web APIs
- [Pythagorean Calculator — Right Triangle Hypotenuse](https://utillica.com/en/pythagorean): A Pythagorean calculator finds hypotenuse c from the two legs a and b of a right triangle.
  Sources: MDN Web Docs: Client-side web APIs
- [Tally Counter — Click Counter](https://utillica.com/en/tally-counter): A tally counter manually tracks a quantity by incrementing, decrementing, and resetting a number with button clicks.
  Sources: MDN Web Docs: Client-side web APIs
- [Sales Tax Calculator — Global SEO Calculator](https://utillica.com/en/sales-tax): Sales Tax Calculator is a browser-based calculator that calculates tax amount and total from a price and manually entered tax rate.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Scientific Notation Converter — Global SEO Calculator](https://utillica.com/en/scientific-notation): Scientific Notation Converter is a browser-based calculator that converts a number into coefficient and power-of-ten notation.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Significant Figures Calculator — Global SEO Calculator](https://utillica.com/en/significant-figures): Significant Figures Calculator is a browser-based calculator that rounds a number to a requested count of significant figures.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Square Footage Calculator — Global SEO Calculator](https://utillica.com/en/square-footage): Square Footage Calculator is a browser-based calculator that calculates square footage and optional cost from room dimensions.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Amortization Schedule Calculator — Global SEO Calculator](https://utillica.com/en/amortization-schedule): Amortization Schedule Calculator is a browser-based calculator that calculates monthly payment and amortization breakdown from principal, apr, and term.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Macro Calculator — Global SEO Calculator](https://utillica.com/en/macro-calculator): Macro Calculator is a browser-based calculator that estimates target calories and macros with the mifflin-st jeor equation.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Protein Calculator — Global SEO Calculator](https://utillica.com/en/protein-calculator): Protein Calculator is a browser-based calculator that calculates daily protein range from body weight and g/kg target.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Sleep Cycle Calculator — Global SEO Calculator](https://utillica.com/en/sleep-cycle): Sleep Cycle Calculator is a browser-based calculator that suggests bedtimes or wake times using 90-minute sleep cycles.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Percent Error Calculator — Global SEO Calculator](https://utillica.com/en/percent-error): Percent Error Calculator is a browser-based calculator that calculates absolute error and percent error from observed and true values.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Slope Calculator — Global SEO Calculator](https://utillica.com/en/slope-calculator): Slope Calculator is a browser-based calculator that calculates line slope and y-intercept from two points.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Kimchi Ingredient Calculator — Browser Everyday Tool](https://utillica.com/en/kimchi-ingredient-calculator): Kimchi Ingredient Calculator is a browser-based everyday helper that estimates kimchi seasoning ingredients from napa cabbage weight.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Ohm's Law Calculator — Voltage, Current, Resistance, Power](https://utillica.com/en/ohms-law): An Ohm's law calculator finds the remaining two of voltage, current, resistance, and power from any two known values using V = I × R and P = V × I.
  Sources: BIPM — The International System of Units (SI Brochure); IEC Electropedia — International Electrotechnical Vocabulary; MDN Web Docs: Client-side web APIs
- [Watts to Amps Calculator — DC, AC Single-Phase, Three-Phase](https://utillica.com/en/watts-to-amps): A watts to amps calculator finds current (A) from power (W), voltage (V), and power factor (PF) for DC, AC single-phase, and AC three-phase circuits.
  Sources: BIPM — The International System of Units (SI Brochure); IEC Electropedia — International Electrotechnical Vocabulary; MDN Web Docs: Client-side web APIs
- [Amps to Watts Calculator — DC, AC Single-Phase, Three-Phase](https://utillica.com/en/amps-to-watts): An amps to watts calculator finds real power (W) from current (A), voltage (V), and power factor (PF) for DC, AC single-phase, and AC three-phase circuits.
  Sources: BIPM — The International System of Units (SI Brochure); IEC Electropedia — International Electrotechnical Vocabulary; MDN Web Docs: Client-side web APIs
- [Watts to kWh Calculator — Energy from Power and Hours](https://utillica.com/en/watts-to-kwh): A watts to kWh calculator multiplies power (W) by usage hours and divides by 1000 to get energy in kilowatt-hours, the unit used for electricity billing.
  Sources: BIPM — The International System of Units (SI Brochure); IEC Electropedia — International Electrotechnical Vocabulary; MDN Web Docs: Client-side web APIs
- [Korean Electricity Bill Calculator — Residential Progressive Rates](https://utillica.com/en/electricity-bill): A Korean electricity bill calculator applies the KEPCO residential progressive tariff to monthly usage (kWh) and returns an estimated bill including base charge, tiered energy charges, climate charge, fuel adjustment, 10% VAT, and the 2.7% power industry fund.
  Sources: 한국전력공사 전기요금표 — 주택용 전력; MDN Web Docs: Client-side web APIs
- [kVA to Amps Calculator — Single-Phase and Three-Phase](https://utillica.com/en/kva-to-amps): A kVA to amps calculator finds current from apparent power and voltage using I = 1000 × kVA / V for single-phase and I = 1000 × kVA / (√3 × V) for three-phase circuits.
  Sources: BIPM — The International System of Units (SI Brochure); IEC Electropedia — International Electrotechnical Vocabulary; MDN Web Docs: Client-side web APIs
- [Amps to kVA Calculator — Single-Phase and Three-Phase](https://utillica.com/en/amps-to-kva): An amps to kVA calculator finds apparent power from current and voltage using kVA = V × I / 1000 for single-phase and kVA = √3 × V × I / 1000 for three-phase circuits.
  Sources: BIPM — The International System of Units (SI Brochure); IEC Electropedia — International Electrotechnical Vocabulary; MDN Web Docs: Client-side web APIs
- [Power Factor Calculator — PF and Reactive Power from kW and kVA](https://utillica.com/en/power-factor): A power factor calculator divides real power (kW) by apparent power (kVA) to get the power factor and uses √(kVA² − kW²) to find reactive power (kvar).
  Sources: BIPM — The International System of Units (SI Brochure); IEC Electropedia — International Electrotechnical Vocabulary; MDN Web Docs: Client-side web APIs
- [Voltage Divider Calculator — Vout from R1 and R2](https://utillica.com/en/voltage-divider): A voltage divider calculator finds the output voltage across R2 in a series resistor pair using Vout = Vin × R2 / (R1 + R2).
  Sources: BIPM — The International System of Units (SI Brochure); IEC Electropedia — International Electrotechnical Vocabulary; MDN Web Docs: Client-side web APIs
- [Resistor Color Code Calculator — 4-Band and 5-Band Values](https://utillica.com/en/resistor-color-code): A resistor color code calculator converts 4-band and 5-band color bands into digits, a multiplier, and tolerance per the IEC 60062 marking code to find the resistance value.
  Sources: IEC 60062 — Marking codes for resistors and capacitors; IEC Electropedia — International Electrotechnical Vocabulary; MDN Web Docs: Client-side web APIs
- [mAh to Wh Converter — Battery Capacity to Watt-Hours](https://utillica.com/en/mah-to-wh): An mAh to Wh converter multiplies battery capacity (mAh) by voltage (V) and divides by 1000 to get energy in watt-hours.
  Sources: BIPM — The International System of Units (SI Brochure); IEC Electropedia — International Electrotechnical Vocabulary; MDN Web Docs: Client-side web APIs
- [Wh to mAh Converter — Watt-Hours to Battery Capacity](https://utillica.com/en/wh-to-mah): A Wh to mAh converter multiplies energy (Wh) by 1000 and divides by voltage (V) to get battery capacity in milliampere-hours.
  Sources: BIPM — The International System of Units (SI Brochure); IEC Electropedia — International Electrotechnical Vocabulary; MDN Web Docs: Client-side web APIs
- [Calorie Calculator — Daily Needs & TDEE](https://utillica.com/en/calorie-calculator): A calorie calculator estimates basal metabolic rate (BMR) with the Mifflin-St Jeor equation and multiplies it by an activity factor to get daily maintenance calories (TDEE) plus weight-loss and gain targets.
  Sources: A new predictive equation for resting energy expenditure in healthy individuals (Mifflin-St Jeor, 1990); The Harris Benedict equation reevaluated (Roza & Shizgal, 1984)
- [BMR Calculator — Mifflin-St Jeor vs Harris-Benedict](https://utillica.com/en/bmr-calculator): A BMR calculator estimates the minimum daily energy your body needs at complete rest, using both the Mifflin-St Jeor and Harris-Benedict equations for comparison.
  Sources: A new predictive equation for resting energy expenditure in healthy individuals (Mifflin-St Jeor, 1990); The Harris Benedict equation reevaluated (Roza & Shizgal, 1984)
- [Body Fat Calculator — US Navy Method](https://utillica.com/en/body-fat-calculator): A body fat calculator estimates body fat percentage from tape-measured neck, waist (plus hip for women) circumferences and height using the US Navy circumference method.
  Sources: Prediction of percent body fat for U.S. Navy men from body circumferences and height (Hodgdon & Beckett, 1984); Body mass index as a measure of body fatness: age- and sex-specific prediction formulas (Deurenberg, 1991); Percent body fat norms for men and women
- [Ideal Weight Calculator — Devine, Robinson, Miller, BMI 22](https://utillica.com/en/ideal-weight-calculator): An ideal weight calculator estimates the body weight statistically associated with lower health risk for a given height, using the Devine, Robinson, and Miller formulas and a BMI 22 reference.
  Sources: The origin of the "ideal" body weight equations (Pai & Paloucek, 2000); Appropriate body-mass index for Asian populations
- [Running Pace Calculator — Distance, Time, Pace](https://utillica.com/en/pace-calculator): A running pace calculator solves for the missing value among distance, time, and pace, and projects finish times for 5K, 10K, half marathon, and marathon.
  Sources: World Athletics Book of Rules — road race distances
- [Calories Burned Calculator — MET Based](https://utillica.com/en/calories-burned): A calories burned calculator estimates exercise energy expenditure by multiplying the activity MET value, body weight, and duration.
  Sources: 2011 Compendium of Physical Activities: a second update of codes and MET values; Compendium of Physical Activities
- [BAC Calculator — Widmark Formula](https://utillica.com/en/bac-calculator): A BAC calculator estimates blood alcohol concentration over time using the Widmark formula from drink volume, alcohol percentage, body weight, and hours elapsed.
  Sources: 도로교통법 제44조·제148조의2 — 음주운전 금지 및 처벌; 음주운전 금지 등 (찾기쉬운 생활법령정보); The estimation of blood alcohol concentration: Widmark revisited (Posey & Mozayani, 2007)
- [Water Intake Calculator — By Weight & Activity](https://utillica.com/en/water-intake): A water intake calculator estimates a recommended daily fluid range using 30–35 ml per kilogram of body weight plus an addition for exercise time.
  Sources: Scientific Opinion on Dietary Reference Values for water; Dietary Reference Intakes for Water, Potassium, Sodium, Chloride, and Sulfate
- [Simple Interest Calculator — Interest from Principal, Rate, Time](https://utillica.com/en/simple-interest): A simple interest calculator finds interest and the maturity amount when interest accrues on the principal only.
  Sources: Simple Interest; Compound interest calculator
- [Auto Loan Calculator — Monthly Payment and Total Interest](https://utillica.com/en/auto-loan): An auto loan calculator applies the amortization formula to the financed amount (vehicle price minus down payment) to estimate the monthly payment and total interest.
  Sources: FINE — financial product comparison portal; Korea Federation of Banks consumer portal; Auto loans — understanding monthly payments
- [Loan Prepayment Fee Calculator — Early Repayment Penalty](https://utillica.com/en/prepayment-fee): A prepayment fee calculator estimates the early repayment fee as repaid amount × fee rate × (remaining days ÷ total loan days), the sliding method commonly used by Korean banks.
  Sources: FINE — financial product comparison portal; Korea Federation of Banks consumer portal
- [Savings Goal Calculator — Monthly Saving for a Target Amount](https://utillica.com/en/savings-goal): A savings goal calculator works backward from a target amount, period, and annual return to the required monthly deposit.
  Sources: Savings goal calculator
- [Unit Price Calculator — Compare Price per 100g/100ml](https://utillica.com/en/unit-price): A unit price calculator divides price by quantity for two products and tells you which one costs less per 100 units (g, ml, or count).
  Sources: NIST Handbook 130 — Uniform Unit Pricing Regulation
- [Fuel Cost Calculator — Trip Cost from Distance and Fuel Economy](https://utillica.com/en/fuel-cost): A fuel cost calculator divides distance by fuel economy to get the fuel needed, then multiplies by the price per liter for the trip cost.
  Sources: Fuel economy label calculations; NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [Speed Distance Time Calculator — Solve for the Missing Value](https://utillica.com/en/speed-distance-time): A speed distance time calculator solves the relation v = d ÷ t for whichever of the three values is unknown.
  Sources: NIST Guide to the SI: conversion factors; SI Brochure: The International System of Units
- [Final Grade Calculator — Score Needed on the Final Exam](https://utillica.com/en/final-grade): A final grade calculator solves needed = (target - current × (1 - w)) ÷ w to find the minimum score required on a final exam with weight w.
  Sources: Percent
- [Test Grade Calculator — Score and Letter Grade from Wrong Answers](https://utillica.com/en/test-grade): A test grade calculator computes (questions - wrong) ÷ questions × 100 and maps the score to a letter grade from A+ to F.
  Sources: Percent
- [Molar Mass Calculator — g/mol from a Chemical Formula](https://utillica.com/en/molar-mass): A molar mass calculator parses a chemical formula and sums IUPAC standard atomic weight × atom count for every element to give the molar mass in g/mol.
  Sources: Standard atomic weights; Periodic Table of Elements
- [Dog Age Calculator — Dog Years to Human Years by Size](https://utillica.com/en/dog-age): A dog age calculator converts dog years to human years using 15 for the first year, +9 for the second, then +4 to +6 per year depending on breed size.
  Sources: Quantitative translation of dog-to-human aging (epigenetic clock); How to calculate dog years to human years
- [Cat Age Calculator — Cat Years to Human Years](https://utillica.com/en/cat-age): A cat age calculator converts cat years to human years using the common veterinary rule: 15 for the first year, +9 for the second, then +4 per year.
  Sources: How to tell your cat’s age in human years; 2021 AAHA/AAFP Feline Life Stage Guidelines
- [Korea Capital Gains Tax Calculator — Property Sale Tax with 2026 Rates](https://utillica.com/en/capital-gains-tax): The Korea capital gains tax calculator is a browser-based calculator that estimates tax on selling Korean real estate by applying the long-term holding special deduction, the KRW 2.5 million basic deduction, the 2026 progressive rates of 6 to 45 percent, and the 10 percent local income tax.
  Sources: Income Tax Act: capital gains rates and long-term holding deduction (Articles 89, 95, 104); Comprehensive income tax rate table (same 6-45% progressive brackets); Hometax capital gains tax mock calculation service
- [Building Coverage Ratio and FAR Calculator — Korean Zoning Limits](https://utillica.com/en/building-coverage-ratio): The building coverage ratio and FAR calculator is a browser-based calculator that computes coverage (building area ÷ land area × 100) and floor area ratio (total floor area ÷ land area × 100) and compares them with Korean zoning caps.
  Sources: National Land Planning and Utilization Act (Articles 77, 78); National Land Planning Act Enforcement Decree (Articles 84, 85 zoning caps); Building Act Enforcement Decree (Article 119 area calculation)
- [Korea Real Estate Registration Cost Calculator — Taxes, Bond, and Fees](https://utillica.com/en/registration-cost): The Korea real estate registration cost calculator is a browser-based calculator that estimates the closing costs of registering a purchased Korean home by adding acquisition tax, local education tax, rural special tax, the national housing bond immediate-sale cost, and an estimated judicial scrivener fee.
  Sources: Local Tax Act: acquisition tax and local education tax rates; Real estate acquisition tax guide; National Housing Bond purchase rates by region and standard value; Korea Association of Certified Judicial Scriveners fee standards
- [English Test Score Converter — TOEIC, TOEFL iBT, IELTS, OPIc](https://utillica.com/en/language-score-converter): The English test score converter is a browser-based converter that maps a TOEIC, TOEFL iBT, or IELTS score to the commonly accepted equivalent band and shows the OPIc grade and TOEIC Speaking range used as references in Korean hiring.
  Sources: IELTS and TOEFL official score comparison; TOEIC program score information; OPIc rating scale (ACTFL proficiency levels); TOEIC and TOEIC Speaking Korea official site
- [Dutch Pay Calculator — Split Bills with Partial Participants](https://utillica.com/en/dutch-pay): A Dutch pay calculator compares what each person paid with what they owe for each participating item, then builds a settlement table.
  Sources: MDN Web Docs: Client-side web APIs; Arithmetic mean
- [Drinking Settlement Calculator — Time-Weighted Bill Split](https://utillica.com/en/drinking-settlement): A drinking settlement calculator allocates the total bill by each person’s attendance time, compares it with what they paid, and builds a transfer table.
  Sources: MDN Web Docs: Client-side web APIs; Arithmetic mean
- [Stock Average Price Calculator — Average Down After Buying More](https://utillica.com/en/stock-average-price): A stock average price calculator adds the current purchase cost and the new purchase cost, then divides by total shares to find the new average cost.
  Sources: Cost basis; MDN Web Docs: Client-side web APIs
- [Coffee Brew Ratio Calculator — Coffee to Water](https://utillica.com/en/coffee-brew-ratio): A coffee brew ratio calculator multiplies coffee weight by the water ratio to find the water amount for a brewing recipe.
  Sources: MDN Web Docs: Client-side web APIs; Arithmetic operations
- [Alcohol Dilution Calculator — Water for Target ABV](https://utillica.com/en/soju-dilution): An alcohol dilution calculator uses alcohol-volume conservation to estimate how much water is needed to lower a drink to a target ABV.
  Sources: MDN Web Docs: Client-side web APIs; Arithmetic operations
- [Baggage Weight Distribution Calculator — Bag Limit Check](https://utillica.com/en/baggage-weight-distribution): A baggage weight distribution calculator shows average weight per bag and total overage or remaining allowance against a per-bag airline limit.
  Sources: MDN Web Docs: Client-side web APIs; Arithmetic operations
- [Loan Refinance Break-Even Calculator — Months to Recover Cost](https://utillica.com/en/loan-refinance-break-even): A loan refinance break-even calculator estimates simple monthly interest savings from a rate difference and divides switching costs by those savings.
  Sources: MDN Web Docs: Client-side web APIs; Arithmetic operations
- [Recipe Scaler — Browser Calculator](https://utillica.com/en/recipe-scaler): Recipe Scaler is a browser-based everyday calculator that scales ingredient quantities from original servings to target servings.
  Sources: MDN Web Docs: Client-side web APIs; Arithmetic operations
- [Pet Food Amount Calculator — Browser Calculator](https://utillica.com/en/pet-food-calculator): Pet Food Amount Calculator is a browser-based everyday calculator that estimates daily pet food amount from weight, activity factor, and food calories.
  Sources: MDN Web Docs: Client-side web APIs; Arithmetic operations
- [FIRE Calculator — Browser Calculator](https://utillica.com/en/fire-calculator): FIRE Calculator is a browser-based everyday calculator that estimates time to financial independence from expenses, portfolio, savings, and returns.
  Sources: MDN Web Docs: Client-side web APIs; Arithmetic operations
- [Savings Ladder Simulator — Browser Calculator](https://utillica.com/en/savings-ladder): Savings Ladder Simulator is a browser-based everyday calculator that estimates maturity flow for a monthly savings ladder.
  Sources: MDN Web Docs: Client-side web APIs; Arithmetic operations
- [Running Race Predictor — Browser Calculator](https://utillica.com/en/running-race-predictor): Running Race Predictor is a browser-based everyday calculator that predicts race time for another distance from a recent race result.
  Sources: MDN Web Docs: Client-side web APIs; Arithmetic operations
- [Heart Rate Zone Calculator — Browser Calculator](https://utillica.com/en/heart-rate-zone): Heart Rate Zone Calculator is a browser-based everyday calculator that calculates karvonen training zones from maximum and resting heart rate.
  Sources: MDN Web Docs: Client-side web APIs; Arithmetic operations
- [Paint Wallpaper Tile Calculator — Browser Calculator](https://utillica.com/en/paint-wallpaper-tile-calculator): Paint Wallpaper Tile Calculator is a browser-based everyday calculator that calculates cans, rolls, or boxes needed from area and product coverage.
  Sources: MDN Web Docs: Client-side web APIs; Arithmetic operations
- [Curtain and Blind Size Calculator — Browser Calculator](https://utillica.com/en/curtain-blind-size): Curtain and Blind Size Calculator is a browser-based everyday calculator that calculates order dimensions from measured window size and fullness factor.
  Sources: MDN Web Docs: Client-side web APIs; Arithmetic operations
- [Even Pace Training Table — Browser Time Planning Tool](https://utillica.com/en/one-pace-training-table): Even Pace Training Table is a browser-based time planning tool that calculates even pace and cumulative split times from target distance and time.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification

## Network

Category hub: https://utillica.com/en/category/network

- [What Is My IP Address](https://utillica.com/en/what-is-my-ip): This tool detects and displays the public IP address (IPv4 or IPv6) of your current request from the server.
  Sources: HTTP Semantics
- [DNS Lookup — Server Diagnostic Tool](https://utillica.com/en/dns-lookup): DNS Lookup is a server-based utility that checks a, aaaa, cname, mx, ns, and txt records for a domain from an entered domain.
  Sources: HTTP Semantics; The robots.txt file format; Sitemaps XML protocol; The Open Graph protocol; WHOIS Protocol Specification; The Transport Layer Security (TLS) Protocol Version 1.3
- [IP Diagnostics — Server Diagnostic Tool](https://utillica.com/en/ip-diagnostics): IP Diagnostics is a server-based utility that checks resolved addresses, ip versions, public routability, and reverse dns for a domain or ip from an entered domain or ip.
  Sources: HTTP Semantics; The robots.txt file format; Sitemaps XML protocol; The Open Graph protocol; WHOIS Protocol Specification; The Transport Layer Security (TLS) Protocol Version 1.3
- [WHOIS Lookup — Server Diagnostic Tool](https://utillica.com/en/whois-lookup): WHOIS Lookup is a server-based utility that looks up public whois registration information for a domain from an entered 도메인.
  Sources: HTTP Semantics; The robots.txt file format; Sitemaps XML protocol; The Open Graph protocol; WHOIS Protocol Specification; The Transport Layer Security (TLS) Protocol Version 1.3
- [SSL Certificate Checker — Server Diagnostic Tool](https://utillica.com/en/ssl-checker): SSL Certificate Checker is a server-based utility that checks issuer, subject, expiry, and remaining days for the tls certificate on port 443 from an entered 도메인.
  Sources: HTTP Semantics; The robots.txt file format; Sitemaps XML protocol; The Open Graph protocol; WHOIS Protocol Specification; The Transport Layer Security (TLS) Protocol Version 1.3
- [HTTP Header Checker — Server Diagnostic Tool](https://utillica.com/en/http-header-checker): HTTP Header Checker is a server-based utility that checks response status and headers for a url from an entered url.
  Sources: HTTP Semantics; The robots.txt file format; Sitemaps XML protocol; The Open Graph protocol; WHOIS Protocol Specification; The Transport Layer Security (TLS) Protocol Version 1.3
- [robots.txt Checker — Server Diagnostic Tool](https://utillica.com/en/robots-checker): robots.txt Checker is a server-based utility that checks whether a site has robots.txt and previews key lines from an entered url.
  Sources: HTTP Semantics; The robots.txt file format; Sitemaps XML protocol; The Open Graph protocol; WHOIS Protocol Specification; The Transport Layer Security (TLS) Protocol Version 1.3
- [Sitemap Checker — Server Diagnostic Tool](https://utillica.com/en/sitemap-checker): Sitemap Checker is a server-based utility that checks whether a site has sitemap.xml and previews key lines from an entered url.
  Sources: HTTP Semantics; The robots.txt file format; Sitemaps XML protocol; The Open Graph protocol; WHOIS Protocol Specification; The Transport Layer Security (TLS) Protocol Version 1.3
- [URL Preview — Server Diagnostic Tool](https://utillica.com/en/url-preview): URL Preview is a server-based utility that summarizes page title, description, canonical url, and open graph metadata from an entered url.
  Sources: HTTP Semantics; The robots.txt file format; Sitemaps XML protocol; The Open Graph protocol; WHOIS Protocol Specification; The Transport Layer Security (TLS) Protocol Version 1.3
- [Open Graph Checker — Server Diagnostic Tool](https://utillica.com/en/open-graph-checker): Open Graph Checker is a server-based utility that checks sharing metadata such as og:title, og:description, and og:image for a url from an entered url.
  Sources: HTTP Semantics; The robots.txt file format; Sitemaps XML protocol; The Open Graph protocol; WHOIS Protocol Specification; The Transport Layer Security (TLS) Protocol Version 1.3
- [Simple Page Speed Checker — Server Diagnostic Tool](https://utillica.com/en/page-speed-checker): Simple Page Speed Checker is a server-based utility that checks basic performance signals such as html response time, size, and cache headers from an entered url.
  Sources: HTTP Semantics; The robots.txt file format; Sitemaps XML protocol; The Open Graph protocol; WHOIS Protocol Specification; The Transport Layer Security (TLS) Protocol Version 1.3
- [DNSBL Check — Network and Email Security Diagnostic](https://utillica.com/en/dnsbl-check): DNSBL Check checks an entered ip or domain on the server and checks a small dnsbl/rbl list for an ip or domain.
  Sources: HTTP Semantics; The robots.txt file format; Sitemaps XML protocol; The Open Graph protocol; WHOIS Protocol Specification; The Transport Layer Security (TLS) Protocol Version 1.3
- [SPF Checker — Network and Email Security Diagnostic](https://utillica.com/en/spf-checker): SPF Checker checks an entered domain on the server and checks spf txt record presence and basic warnings.
  Sources: HTTP Semantics; The robots.txt file format; Sitemaps XML protocol; The Open Graph protocol; WHOIS Protocol Specification; The Transport Layer Security (TLS) Protocol Version 1.3
- [DKIM Checker — Network and Email Security Diagnostic](https://utillica.com/en/dkim-checker): DKIM Checker checks an entered domain selector on the server and looks up selector._domainkey dkim txt records.
  Sources: HTTP Semantics; The robots.txt file format; Sitemaps XML protocol; The Open Graph protocol; WHOIS Protocol Specification; The Transport Layer Security (TLS) Protocol Version 1.3
- [DMARC Checker — Network and Email Security Diagnostic](https://utillica.com/en/dmarc-checker): DMARC Checker checks an entered domain on the server and checks _dmarc txt record and policy.
  Sources: HTTP Semantics; The robots.txt file format; Sitemaps XML protocol; The Open Graph protocol; WHOIS Protocol Specification; The Transport Layer Security (TLS) Protocol Version 1.3
- [Redirect Checker — Network and Email Security Diagnostic](https://utillica.com/en/redirect-checker): Redirect Checker checks an entered url on the server and checks url redirect chains and final status.
  Sources: HTTP Semantics; The robots.txt file format; Sitemaps XML protocol; The Open Graph protocol; WHOIS Protocol Specification; The Transport Layer Security (TLS) Protocol Version 1.3
- [URL Unshortener — Network and Email Security Diagnostic](https://utillica.com/en/url-unshortener): URL Unshortener checks an entered short url on the server and expands short url redirect chains.
  Sources: HTTP Semantics; The robots.txt file format; Sitemaps XML protocol; The Open Graph protocol; WHOIS Protocol Specification; The Transport Layer Security (TLS) Protocol Version 1.3
- [Security Headers Checker — Network and Email Security Diagnostic](https://utillica.com/en/security-headers-checker): Security Headers Checker checks an entered url on the server and checks http security headers such as hsts, csp, and x-frame-options.
  Sources: HTTP Semantics; The robots.txt file format; Sitemaps XML protocol; The Open Graph protocol; WHOIS Protocol Specification; The Transport Layer Security (TLS) Protocol Version 1.3
- [TLS Certificate Checker — Network and Email Security Diagnostic](https://utillica.com/en/tls-certificate-checker): TLS Certificate Checker checks an entered domain on the server and checks tls certificate subject, issuer, and expiry details.
  Sources: HTTP Semantics; The robots.txt file format; Sitemaps XML protocol; The Open Graph protocol; WHOIS Protocol Specification; The Transport Layer Security (TLS) Protocol Version 1.3

## Random

Category hub: https://utillica.com/en/category/random

- [Password Generator — Secure Random Password](https://utillica.com/en/password-generator): A password generator creates cryptographically secure random passwords or passphrases from your chosen length, character types, and exclusion rules.
  Sources: Crypto.getRandomValues()
- [Random Number Generator — Browser Random Tool](https://utillica.com/en/random-number): Random Number Generator is a browser random tool that generates a random integer inside a chosen range.
  Sources: ECMAScript Language Specification
- [Passphrase Generator — Browser Random Tool](https://utillica.com/en/passphrase-generator): Passphrase Generator is a browser random tool that generates a memorable multi-word passphrase.
  Sources: ECMAScript Language Specification
- [Random String Generator — Browser Random Tool](https://utillica.com/en/random-string): Random String Generator is a browser random tool that generates a random string with a chosen length.
  Sources: ECMAScript Language Specification
- [Random Name Generator — Browser Random Tool](https://utillica.com/en/random-name): Random Name Generator is a browser random tool that combines a random test name.
  Sources: ECMAScript Language Specification
- [Random Nickname Generator — Browser Random Tool](https://utillica.com/en/random-nickname): Random Nickname Generator is a browser random tool that combines a random adjective and noun nickname.
  Sources: ECMAScript Language Specification
- [Random Team Generator — Browser Random Tool](https://utillica.com/en/team-randomizer): Random Team Generator is a browser random tool that randomly assigns a list of names into teams.
  Sources: ECMAScript Language Specification
- [Roulette Picker — Browser Random Tool](https://utillica.com/en/roulette): Roulette Picker is a browser random tool that randomly picks one option from a list.
  Sources: ECMAScript Language Specification
- [Draw Lots — Browser Random Tool](https://utillica.com/en/draw-lots): Draw Lots is a browser random tool that shuffles a list into a random draw order.
  Sources: ECMAScript Language Specification
- [ULID Generator — Browser Random Tool](https://utillica.com/en/ulid-generator): ULID Generator is a browser random tool that generates a time-sortable ulid string.
  Sources: ECMAScript Language Specification
- [Nano ID Generator — Browser Random Tool](https://utillica.com/en/nanoid-generator): Nano ID Generator is a browser random tool that generates a short url-friendly unique id.
  Sources: ECMAScript Language Specification
- [Coin Flip — Browser Random Tool](https://utillica.com/en/coin-flip): Coin Flip is a browser random tool that randomly selects heads or tails.
  Sources: ECMAScript Language Specification
- [Dice Roller — Browser Random Tool](https://utillica.com/en/dice-roller): Dice Roller is a browser random tool that generates a random die value from 1 to 6.
  Sources: ECMAScript Language Specification
- [Dummy Person Generator — Browser Random Tool](https://utillica.com/en/dummy-person-generator): Dummy Person Generator is a browser random tool that generates fake person data for testing.
  Sources: ECMAScript Language Specification
- [Dummy JSON Generator — Browser Random Tool](https://utillica.com/en/dummy-json): Dummy JSON Generator is a browser random tool that generates dummy json objects for testing.
  Sources: ECMAScript Language Specification
- [Tournament Bracket Generator — Random Generator](https://utillica.com/en/tournament-bracket): Tournament Bracket Generator is a tool that generates tournament brackets from names.
  Sources: ECMAScript Language Specification
- [Seat Assignment Generator — Random Generator](https://utillica.com/en/seat-assignment): Seat Assignment Generator is a tool that randomly assigns classroom seats.
  Sources: ECMAScript Language Specification
- [Bus Seat Assignment — Random Generator](https://utillica.com/en/bus-seat-assignment): Bus Seat Assignment is a tool that randomly assigns bus seats.
  Sources: ECMAScript Language Specification
- [Rock Paper Scissors — Random Generator](https://utillica.com/en/rock-paper-scissors): Rock Paper Scissors is a tool that generates rock-paper-scissors results.
  Sources: ECMAScript Language Specification
- [Fortune Cookie — Random Generator](https://utillica.com/en/fortune-cookie): Fortune Cookie is a tool that generates short fortune-cookie messages.
  Sources: ECMAScript Language Specification
- [Lotto Number Generator with Fixed and Excluded Numbers — Browser Everyday Tool](https://utillica.com/en/lotto-number-generator): Lotto Number Generator with Fixed and Excluded Numbers is a browser-based everyday helper that generates lottery number sets from 1 to 45 with fixed and excluded numbers.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Name Initial and Nickname Combiner — Browser Everyday Tool](https://utillica.com/en/nickname-initial-combiner): Name Initial and Nickname Combiner is a browser-based everyday helper that combines nickname candidates from a name or initials.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Love Calculator — Compatibility Score from Two Names](https://utillica.com/en/love-calculator): The Love Calculator is an entertainment-only tool that turns two names into a 0-100% compatibility score with a hash function (FNV-1a); it has no scientific basis.
  Sources: The FNV Non-Cryptographic Hash Algorithm (IETF draft); MDN Web Docs: Client-side web APIs
- [Korean Name Compatibility Test — Traditional Stroke Count Game](https://utillica.com/en/name-compatibility): The Korean Name Compatibility Test is an entertainment-only tool that plays the traditional Korean stroke-count game: it interleaves two Hangul names, counts each character's strokes, and repeatedly keeps the last digit of neighboring sums until a two-digit score remains; it has no scientific basis.
  Sources: The Unicode Standard — Hangul Syllables (U+AC00-U+D7AF); MDN Web Docs: Client-side web APIs

## Developer

Category hub: https://utillica.com/en/category/developer

- [UUID Generator — Browser Random Tool](https://utillica.com/en/uuid-generator): UUID Generator is a browser random tool that generates an rfc 4122 uuid.
  Sources: ECMAScript Language Specification
- [Korean Corporate and Resident ID Format Validator — Browser Everyday Tool](https://utillica.com/en/korean-id-format-validator): Korean Corporate and Resident ID Format Validator is a browser-based everyday helper that checks korean corporate registration and resident registration number formats in the browser.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [QR Code Generator — Text & URL to QR](https://utillica.com/en/qr-generator): A QR code generator turns text, URLs, Wi-Fi, email, and phone values into scannable QR code images in the browser.
  Sources: ISO/IEC 18004:2015 QR Code symbology
- [Barcode Generator — Code 39 SVG](https://utillica.com/en/barcode-generator): A barcode generator turns an input code into a scannable Code 39 SVG barcode in the browser.
  Sources: ISO/IEC 16388:2007 Code 39 bar code symbology
- [Code to Image — Developer Share Image](https://utillica.com/en/code-to-image): Code to Image turns code snippets into canvas PNG images.
  Sources: MDN Web Docs: Client-side web APIs
- [JSON to CSV Converter — Browser Data Format Tool](https://utillica.com/en/json-to-csv): The JSON to CSV converter is a browser-based developer tool that parses JSON, normalizes it into a shared data structure, and serializes it as CSV.
  Sources: MDN Web Docs: Client-side web APIs; YAML 1.2.2 Specification; TOML v1.0.0; Extensible Markup Language (XML) 1.0; RFC 4180: Common Format and MIME Type for CSV Files
- [CSV to JSON Converter — Browser Data Format Tool](https://utillica.com/en/csv-to-json): The CSV to JSON converter is a browser-based developer tool that parses CSV, normalizes it into a shared data structure, and serializes it as JSON.
  Sources: MDN Web Docs: Client-side web APIs; YAML 1.2.2 Specification; TOML v1.0.0; Extensible Markup Language (XML) 1.0; RFC 4180: Common Format and MIME Type for CSV Files
- [JSON to YAML Converter — Browser Data Format Tool](https://utillica.com/en/json-to-yaml): The JSON to YAML converter is a browser-based developer tool that parses JSON, normalizes it into a shared data structure, and serializes it as YAML.
  Sources: MDN Web Docs: Client-side web APIs; YAML 1.2.2 Specification; TOML v1.0.0; Extensible Markup Language (XML) 1.0; RFC 4180: Common Format and MIME Type for CSV Files
- [YAML to JSON Converter — Browser Data Format Tool](https://utillica.com/en/yaml-to-json): The YAML to JSON converter is a browser-based developer tool that parses YAML, normalizes it into a shared data structure, and serializes it as JSON.
  Sources: MDN Web Docs: Client-side web APIs; YAML 1.2.2 Specification; TOML v1.0.0; Extensible Markup Language (XML) 1.0; RFC 4180: Common Format and MIME Type for CSV Files
- [JSON to TOML Converter — Browser Data Format Tool](https://utillica.com/en/json-to-toml): The JSON to TOML converter is a browser-based developer tool that parses JSON, normalizes it into a shared data structure, and serializes it as TOML.
  Sources: MDN Web Docs: Client-side web APIs; YAML 1.2.2 Specification; TOML v1.0.0; Extensible Markup Language (XML) 1.0; RFC 4180: Common Format and MIME Type for CSV Files
- [TOML to JSON Converter — Browser Data Format Tool](https://utillica.com/en/toml-to-json): The TOML to JSON converter is a browser-based developer tool that parses TOML, normalizes it into a shared data structure, and serializes it as JSON.
  Sources: MDN Web Docs: Client-side web APIs; YAML 1.2.2 Specification; TOML v1.0.0; Extensible Markup Language (XML) 1.0; RFC 4180: Common Format and MIME Type for CSV Files
- [JSON to XML Converter — Browser Data Format Tool](https://utillica.com/en/json-to-xml): The JSON to XML converter is a browser-based developer tool that parses JSON, normalizes it into a shared data structure, and serializes it as XML.
  Sources: MDN Web Docs: Client-side web APIs; YAML 1.2.2 Specification; TOML v1.0.0; Extensible Markup Language (XML) 1.0; RFC 4180: Common Format and MIME Type for CSV Files
- [XML to JSON Converter — Browser Data Format Tool](https://utillica.com/en/xml-to-json): The XML to JSON converter is a browser-based developer tool that parses XML, normalizes it into a shared data structure, and serializes it as JSON.
  Sources: MDN Web Docs: Client-side web APIs; YAML 1.2.2 Specification; TOML v1.0.0; Extensible Markup Language (XML) 1.0; RFC 4180: Common Format and MIME Type for CSV Files
- [YAML to TOML Converter — Browser Data Format Tool](https://utillica.com/en/yaml-to-toml): The YAML to TOML converter is a browser-based developer tool that parses YAML, normalizes it into a shared data structure, and serializes it as TOML.
  Sources: MDN Web Docs: Client-side web APIs; YAML 1.2.2 Specification; TOML v1.0.0; Extensible Markup Language (XML) 1.0; RFC 4180: Common Format and MIME Type for CSV Files
- [TOML to YAML Converter — Browser Data Format Tool](https://utillica.com/en/toml-to-yaml): The TOML to YAML converter is a browser-based developer tool that parses TOML, normalizes it into a shared data structure, and serializes it as YAML.
  Sources: MDN Web Docs: Client-side web APIs; YAML 1.2.2 Specification; TOML v1.0.0; Extensible Markup Language (XML) 1.0; RFC 4180: Common Format and MIME Type for CSV Files
- [CSV to YAML Converter — Browser Data Format Tool](https://utillica.com/en/csv-to-yaml): The CSV to YAML converter is a browser-based developer tool that parses CSV, normalizes it into a shared data structure, and serializes it as YAML.
  Sources: MDN Web Docs: Client-side web APIs; YAML 1.2.2 Specification; TOML v1.0.0; Extensible Markup Language (XML) 1.0; RFC 4180: Common Format and MIME Type for CSV Files
- [YAML to CSV Converter — Browser Data Format Tool](https://utillica.com/en/yaml-to-csv): The YAML to CSV converter is a browser-based developer tool that parses YAML, normalizes it into a shared data structure, and serializes it as CSV.
  Sources: MDN Web Docs: Client-side web APIs; YAML 1.2.2 Specification; TOML v1.0.0; Extensible Markup Language (XML) 1.0; RFC 4180: Common Format and MIME Type for CSV Files
- [CSV to TSV Converter — Browser Data Format Tool](https://utillica.com/en/csv-to-tsv): The CSV to TSV converter is a browser-based developer tool that parses CSV, normalizes it into a shared data structure, and serializes it as TSV.
  Sources: MDN Web Docs: Client-side web APIs; YAML 1.2.2 Specification; TOML v1.0.0; Extensible Markup Language (XML) 1.0; RFC 4180: Common Format and MIME Type for CSV Files
- [TSV to CSV Converter — Browser Data Format Tool](https://utillica.com/en/tsv-to-csv): The TSV to CSV converter is a browser-based developer tool that parses TSV, normalizes it into a shared data structure, and serializes it as CSV.
  Sources: MDN Web Docs: Client-side web APIs; YAML 1.2.2 Specification; TOML v1.0.0; Extensible Markup Language (XML) 1.0; RFC 4180: Common Format and MIME Type for CSV Files
- [XML to YAML Converter — Browser Data Format Tool](https://utillica.com/en/xml-to-yaml): The XML to YAML converter is a browser-based developer tool that parses XML, normalizes it into a shared data structure, and serializes it as YAML.
  Sources: MDN Web Docs: Client-side web APIs; YAML 1.2.2 Specification; TOML v1.0.0; Extensible Markup Language (XML) 1.0; RFC 4180: Common Format and MIME Type for CSV Files
- [YAML to XML Converter — Browser Data Format Tool](https://utillica.com/en/yaml-to-xml): The YAML to XML converter is a browser-based developer tool that parses YAML, normalizes it into a shared data structure, and serializes it as XML.
  Sources: MDN Web Docs: Client-side web APIs; YAML 1.2.2 Specification; TOML v1.0.0; Extensible Markup Language (XML) 1.0; RFC 4180: Common Format and MIME Type for CSV Files
- [JSON to TypeScript Generator — Browser Type Tool](https://utillica.com/en/json-to-typescript): The JSON to TypeScript generator is a browser-based developer tool that infers objects, arrays, nulls, numbers, and strings from a JSON sample and emits TypeScript code.
  Sources: MDN Web Docs: Client-side web APIs; JSON; JSON Schema Draft 2020-12; TypeScript Handbook
- [JSON to Zod Generator — Browser Type Tool](https://utillica.com/en/json-to-zod): The JSON to Zod generator is a browser-based developer tool that infers objects, arrays, nulls, numbers, and strings from a JSON sample and emits Zod code.
  Sources: MDN Web Docs: Client-side web APIs; JSON; JSON Schema Draft 2020-12; TypeScript Handbook
- [JSON to JSON Schema Generator — Browser Type Tool](https://utillica.com/en/json-to-json-schema): The JSON to JSON Schema generator is a browser-based developer tool that infers objects, arrays, nulls, numbers, and strings from a JSON sample and emits JSON Schema code.
  Sources: MDN Web Docs: Client-side web APIs; JSON; JSON Schema Draft 2020-12; TypeScript Handbook
- [JSON to GraphQL Generator — Browser Type Tool](https://utillica.com/en/json-to-graphql): The JSON to GraphQL generator is a browser-based developer tool that infers objects, arrays, nulls, numbers, and strings from a JSON sample and emits GraphQL code.
  Sources: MDN Web Docs: Client-side web APIs; JSON; JSON Schema Draft 2020-12; TypeScript Handbook
- [JSON to Go Generator — Browser Type Tool](https://utillica.com/en/json-to-go): The JSON to Go generator is a browser-based developer tool that infers objects, arrays, nulls, numbers, and strings from a JSON sample and emits Go code.
  Sources: MDN Web Docs: Client-side web APIs; JSON; JSON Schema Draft 2020-12; TypeScript Handbook
- [JSON to Rust Generator — Browser Type Tool](https://utillica.com/en/json-to-rust): The JSON to Rust generator is a browser-based developer tool that infers objects, arrays, nulls, numbers, and strings from a JSON sample and emits Rust code.
  Sources: MDN Web Docs: Client-side web APIs; JSON; JSON Schema Draft 2020-12; TypeScript Handbook
- [JSON Formatter and Validator — Browser Developer Tool](https://utillica.com/en/json-formatter): JSON Formatter and Validator is a browser-based developer tool that parses, formats, or minifies json.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Base64 Encoder and Decoder — Browser Developer Tool](https://utillica.com/en/base64): Base64 Encoder and Decoder is a browser-based developer tool that encodes text to base64 or decodes base64 to text.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [URL Encoder and Decoder — Browser Developer Tool](https://utillica.com/en/url-encode): URL Encoder and Decoder is a browser-based developer tool that percent-encodes or decodes url text.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [HTML Entity Converter — Browser Developer Tool](https://utillica.com/en/html-entities): HTML Entity Converter is a browser-based developer tool that escapes html special characters or restores entities.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [JWT Decoder — Browser Developer Tool](https://utillica.com/en/jwt-decoder): JWT Decoder is a browser-based developer tool that decodes jwt header and payload without verifying the signature.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Hash Generator — Browser Developer Tool](https://utillica.com/en/hash-generator): Hash Generator is a browser-based developer tool that generates sha-256 or sha-1 hashes from text.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [HMAC Generator — Browser Developer Tool](https://utillica.com/en/hmac-generator): HMAC Generator is a browser-based developer tool that generates an hmac-sha256 value from a key and message.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Regex Tester — Browser Developer Tool](https://utillica.com/en/regex-tester): Regex Tester is a browser-based developer tool that checks matches between a regular expression and test text.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [SQL Formatter — Browser Developer Tool](https://utillica.com/en/sql-formatter): SQL Formatter is a browser-based developer tool that adds readable line breaks around common sql keywords.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [XML Formatter — Browser Developer Tool](https://utillica.com/en/xml-formatter): XML Formatter is a browser-based developer tool that indents xml tag structure.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [HTML Formatter — Browser Developer Tool](https://utillica.com/en/html-formatter): HTML Formatter is a browser-based developer tool that indents html tag structure.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [CSS Minifier — Browser Developer Tool](https://utillica.com/en/css-minifier): CSS Minifier is a browser-based developer tool that removes css comments and unnecessary whitespace.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [JavaScript Minifier — Browser Developer Tool](https://utillica.com/en/js-minifier): JavaScript Minifier is a browser-based developer tool that removes javascript comments and unnecessary whitespace.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Markdown Preview — Browser Developer Tool](https://utillica.com/en/markdown-preview): Markdown Preview is a browser-based developer tool that converts markdown text to a simple html preview string.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [String Escape and Unescape — Browser Developer Tool](https://utillica.com/en/escape-string): String Escape and Unescape is a browser-based developer tool that escapes or unescapes string control characters.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Regex Escape — Browser Developer Tool](https://utillica.com/en/regex-escape): Regex Escape is a browser-based developer tool that escapes regular expression metacharacters for literal search.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Cron Parser — Browser Developer Tool](https://utillica.com/en/cron-parser): Cron Parser is a browser-based developer tool that explains a 5-field cron expression in readable text.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Gitignore Generator — Browser Developer Tool](https://utillica.com/en/gitignore-generator): Gitignore Generator is a browser-based developer tool that generates a .gitignore template from project keywords.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Dockerignore Generator — Browser Developer Tool](https://utillica.com/en/dockerignore-generator): Dockerignore Generator is a browser-based developer tool that generates a .dockerignore template.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [MIME Type Lookup — Browser Developer Tool](https://utillica.com/en/mime-type-lookup): MIME Type Lookup is a browser-based developer tool that looks up mappings between file extensions and mime types.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [HTTP Status Code Lookup — Browser Developer Tool](https://utillica.com/en/http-status-lookup): HTTP Status Code Lookup is a browser-based developer tool that looks up http status code names and meanings.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [User-Agent Parser — Browser Developer Tool](https://utillica.com/en/user-agent-parser): User-Agent Parser is a browser-based developer tool that estimates browser, os, and device from a user-agent string.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [CIDR Calculator — Browser Developer Tool](https://utillica.com/en/cidr-calculator): CIDR Calculator is a browser-based developer tool that calculates network range and host count from cidr notation.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [IPv4 Subnet Calculator — Browser Developer Tool](https://utillica.com/en/subnet-calculator): IPv4 Subnet Calculator is a browser-based developer tool that calculates subnet details from ipv4 and prefix length.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [htpasswd Generator — Browser Developer Tool](https://utillica.com/en/htpasswd): htpasswd Generator is a browser-based developer tool that generates an apache htpasswd {sha} line from a username and password.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Unix Timestamp Converter — Browser Developer Tool](https://utillica.com/en/timestamp-converter): Unix Timestamp Converter is a browser-based developer tool that converts unix timestamps and iso dates.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Number Base Converter — Binary, Octal, Decimal, Hex](https://utillica.com/en/number-base-converter): A number base converter is a developer tool that rewrites an integer expressed in one radix (base 2–36), such as binary or hexadecimal, into another radix.
  Sources: Base; MDN Web Docs: Client-side web APIs
- [Binary Translator — Text to Binary and Back](https://utillica.com/en/binary-translator): A binary translator is a developer tool that encodes a string into UTF-8 bytes shown as 8-bit binary (or hex) and decodes such byte sequences back into text.
  Sources: RFC 3629: UTF-8, a transformation format of ISO 10646; MDN Web Docs: Client-side web APIs
- [Binary Calculator — Add, Subtract, AND, OR, XOR, Shift](https://utillica.com/en/binary-calculator): A binary calculator is a developer tool that performs arithmetic (+, −, ×, ÷) and bitwise operations (AND, OR, XOR, NOT, shifts) on integers entered in binary.
  Sources: Base; MDN Web Docs: Client-side web APIs
- [ASCII Table — Character Codes 0–127 Lookup](https://utillica.com/en/ascii-table): An ASCII table is a reference of the standard character codes 0–127 (33 control characters and 95 printable characters) shown in decimal, hex, octal, and binary.
  Sources: RFC 20: ASCII format for network interchange; MDN Web Docs: Client-side web APIs
- [Unicode Inspector — Code Points, UTF-8 and UTF-16 Bytes](https://utillica.com/en/unicode-inspector): A Unicode inspector is a developer tool that decomposes a string into code points and shows each character's U+ code, UTF-8 bytes, UTF-16 units, and name (or block).
  Sources: The Unicode Standard; RFC 3629: UTF-8, a transformation format of ISO 10646; MDN Web Docs: Client-side web APIs
- [Chmod Calculator — 755 and Symbolic Permissions](https://utillica.com/en/chmod-calculator): A chmod calculator is a developer tool that converts Linux/Unix file permissions between rwx checkboxes, octal notation (e.g. 755), and symbolic notation (e.g. rwxr-xr-x).
  Sources: POSIX chmod utility; MDN Web Docs: Client-side web APIs
- [URL Parser — Split URLs and Edit Query Params](https://utillica.com/en/url-parser): A URL parser is a developer tool that splits an address into protocol, host, port, path, query, and fragment per the WHATWG URL Standard, and lets you edit query parameters and reassemble the URL.
  Sources: URL Living Standard; MDN Web Docs: Client-side web APIs
- [Punycode Converter — IDN to xn-- and Back](https://utillica.com/en/punycode-converter): A punycode converter translates internationalized domain names (IDN) containing non-ASCII characters into the DNS-compatible xn-- ASCII form (RFC 3492) and back.
  Sources: RFC 3492: Punycode — A Bootstring encoding of Unicode for IDNA; RFC 5890: Internationalized Domain Names for Applications (IDNA); MDN Web Docs: Client-side web APIs
- [Bcrypt Hash Generator and Verifier](https://utillica.com/en/bcrypt-generator): A bcrypt generator hashes a password with the bcrypt algorithm (random salt plus a tunable cost factor) and verifies whether a password matches a given hash.
  Sources: A Future-Adaptable Password Scheme (bcrypt); OWASP Password Storage Cheat Sheet; MDN Web Docs: Client-side web APIs
- [Port Number Lookup — Well-Known Ports](https://utillica.com/en/port-lookup): A port lookup is a reference tool for the mapping between well-known TCP/UDP ports and services, such as SSH (22), HTTP (80), HTTPS (443), and MySQL (3306).
  Sources: Service Name and Transport Protocol Port Number Registry; RFC 6335: Service Name and Port Number Procedures; MDN Web Docs: Client-side web APIs
- [Random MAC Address Generator](https://utillica.com/en/mac-address-generator): A random MAC address generator creates 48-bit (6-byte) MAC addresses with secure randomness and outputs them in colon, hyphen, or dot notation, with a locally-administered option that avoids clashing with real vendor addresses.
  Sources: RFC 7042: IEEE 802 Numbers and IETF Protocol and Documentation Usage; MDN Web Docs: Client-side web APIs
- [Credit Card Number Validator — Luhn Check and Brand](https://utillica.com/en/card-validator): A card number validator runs the Luhn checksum (ISO/IEC 7812) on a card number in your browser and identifies the brand, such as Visa or Mastercard, from its leading digits (IIN/BIN).
  Sources: ISO/IEC 7812-1: Identification cards — Numbering system; MDN Web Docs: Client-side web APIs
- [Meta Tag Generator — Title, Description, Canonical, Robots](https://utillica.com/en/meta-tag-generator): A meta tag generator is an SEO tool that turns a page title, description, canonical URL, and robots directive into a finished HTML head snippet.
  Sources: Meta tags and HTML attributes that Google supports; Control your snippets in search results
- [Open Graph Generator — OG & Twitter Card Tags with Preview](https://utillica.com/en/open-graph-generator): An Open Graph generator builds the og:* and twitter:* meta tags that social platforms read to render link share cards, from a title, description, URL, and image.
  Sources: The Open Graph protocol; About X Cards
- [Google SERP Preview — Snippet Truncation Simulator](https://utillica.com/en/serp-preview): A SERP preview simulates how a page title, URL, and meta description will appear in Google search results, marking truncation by rendered pixel width on desktop and mobile layouts.
  Sources: Influencing your title links in search results; Control your snippets in search results
- [Robots.txt Generator — with AI Crawler (GPTBot) Presets](https://utillica.com/en/robots-txt-generator): A robots.txt generator combines a crawl policy, Disallow paths, a sitemap location, and AI-crawler allow/block choices into a robots.txt file ready for your site root.
  Sources: RFC 9309: Robots Exclusion Protocol; Introduction to robots.txt; OpenAI crawlers and bots
- [Sitemap XML Generator — Paste URLs, Get sitemap.xml](https://utillica.com/en/sitemap-xml-generator): A sitemap XML generator converts a pasted list of URLs (one per line) into an XML sitemap file that follows the Sitemaps protocol.
  Sources: Sitemaps XML protocol; Build and submit a sitemap
- [.htaccess Redirect Generator — 301, www, Force HTTPS](https://utillica.com/en/htaccess-redirect-generator): An .htaccess redirect generator produces ready-to-paste Apache snippets for individual 301/302 redirects, www/non-www host canonicalization, and HTTP-to-HTTPS enforcement.
  Sources: Apache mod_alias: Redirect directive; Apache mod_rewrite documentation
- [Hreflang Tag Generator — Multilingual Link Set with x-default](https://utillica.com/en/hreflang-generator): An hreflang generator turns a list of language-code and URL pairs into the <link rel="alternate" hreflang> tag set, including x-default, that declares the language versions of a page.
  Sources: Localized versions of your pages (hreflang); BCP 47: Tags for Identifying Languages (RFC 5646)
- [HTML to Markdown Converter — Instant, In-Browser](https://utillica.com/en/html-to-markdown): An HTML to Markdown converter transforms pasted HTML code into Markdown syntax — headings, lists, links, code — using the Turndown library in your browser.
  Sources: CommonMark Spec; Turndown: HTML to Markdown converter
- [Markdown to HTML Converter — Paste MD, Get HTML](https://utillica.com/en/markdown-to-html): A Markdown to HTML converter turns pasted Markdown text into HTML code ready for blogs, emails, and web pages, entirely in the browser.
  Sources: CommonMark Spec; Turndown: HTML to Markdown converter
- [QR Code Scanner — Read QR from an Image](https://utillica.com/en/qr-scanner): A QR code scanner decodes the content of a QR code from an uploaded or pasted image file, using the jsQR library entirely in the browser.
  Sources: ISO/IEC 18004:2015 QR Code symbology; jsQR: QR code reading library
- [Browser CSR Generator — RSA Private Key and Certificate Request PEM](https://utillica.com/en/csr-generator-browser): A browser CSR generator encodes subject details and SAN names into an ASN.1 PKCS#10 structure, then signs it with the Web Crypto API to produce a certificate request PEM.
  Sources: MDN Web Docs: Client-side web APIs; MDN Web Docs: Web Crypto API; RFC 2986: PKCS #10 Certification Request Syntax; RFC 5280: Internet X.509 Public Key Infrastructure Certificate and CRL Profile
- [SSH Key Generator (ed25519) — Browser OpenSSH Key Pair](https://utillica.com/en/ssh-ed25519-key-generator): An SSH ed25519 key generator creates an Ed25519 key pair with the Web Crypto API and encodes it as OpenSSH public and private key material in the browser.
  Sources: MDN Web Docs: Client-side web APIs; MDN Web Docs: Web Crypto API; RFC 8709: Ed25519 and Ed448 Public Key Algorithms for SSH
- [WireGuard Key Pair Generator — Browser X25519 Keys](https://utillica.com/en/wireguard-keypair-generator): A WireGuard key pair generator creates an X25519 key pair with the browser Web Crypto API and encodes it as WireGuard base64 private/public key strings.
  Sources: MDN Web Docs: Client-side web APIs; MDN Web Docs: Web Crypto API; WireGuard: Quick Start
- [Korean Business Registration Number Validator — 10-Digit Checksum](https://utillica.com/en/business-registration-validator): A Korean business registration number validator checks whether a 10-digit Korean business number has the correct numeric format and checksum.
  Sources: National Tax Service Hometax business registration status service; MDN Web Docs: Client-side web APIs
- [JWT Signer — Browser HS256 Token Generator](https://utillica.com/en/jwt-signer): A JWT signer is a browser developer tool that base64url-encodes JSON header and payload values, then appends an HMAC-SHA256 signature to create an HS256 JSON Web Token.
  Sources: RFC 7519: JSON Web Token (JWT); RFC 7515: JSON Web Signature (JWS); Web Crypto API: SubtleCrypto.sign(); MDN Web Docs: Client-side web APIs
- [SPF Record Generator — Email Sender TXT Builder](https://utillica.com/en/spf-record-generator): An SPF record generator builds a v=spf1 DNS TXT value that declares which mail servers are allowed to send mail for a domain.
  Sources: RFC 7208: Sender Policy Framework (SPF); DNS TXT resource records; MDN Web Docs: Client-side web APIs
- [DKIM Record Generator — selector._domainkey TXT Builder](https://utillica.com/en/dkim-record-generator): A DKIM record generator formats a mail-service public key into a v=DKIM1 DNS TXT value and computes the selector._domainkey host where it should be published.
  Sources: RFC 6376: DomainKeys Identified Mail (DKIM); DNS TXT resource records; MDN Web Docs: Client-side web APIs
- [DMARC Record Generator — p=none/quarantine/reject Policy Builder](https://utillica.com/en/dmarc-record-generator): A DMARC record generator builds the _dmarc DNS TXT value that connects SPF and DKIM authentication results to a domain-level mail handling policy.
  Sources: RFC 7489: Domain-based Message Authentication, Reporting, and Conformance (DMARC); RFC 7208: Sender Policy Framework (SPF); RFC 6376: DomainKeys Identified Mail (DKIM); MDN Web Docs: Client-side web APIs
- [.env to JSON/YAML Converter — Browser Developer Tool](https://utillica.com/en/env-json-yaml-converter): .env to JSON/YAML Converter is a browser-based developer workflow tool that converts .env settings to json/yaml or turns a json object back into .env format.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [JSON Structure Diff — Browser Developer Tool](https://utillica.com/en/json-structure-diff): JSON Structure Diff is a browser-based developer workflow tool that compares key structure and value types between two json documents.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [HTTP Request Builder — Browser Developer Tool](https://utillica.com/en/http-request-builder): HTTP Request Builder is a browser-based developer workflow tool that turns a small request spec into curl, fetch, or httpie commands.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [BIND Zone File Generator — Browser Developer Tool](https://utillica.com/en/bind-zonefile-generator): BIND Zone File Generator is a browser-based developer workflow tool that generates a basic dns zone file from domain, ip, and mail server inputs.
  Sources: MDN Web Docs: Client-side web APIs; RFC 1035: Domain Names - Implementation and Specification
- [UUID v7/ULID Time Decoder — Browser Developer Tool](https://utillica.com/en/uuid-ulid-time-decoder): UUID v7/ULID Time Decoder is a browser-based developer workflow tool that extracts creation time from uuid v7 or ulid strings.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Webhook Payload Mock Generator — Browser Developer Tool](https://utillica.com/en/webhook-payload-mock): Webhook Payload Mock Generator is a browser-based developer workflow tool that generates sample github, stripe, or slack event json payloads.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Regex Pattern Library — Browser Developer Tool](https://utillica.com/en/regex-pattern-library): Regex Pattern Library is a browser-based developer workflow tool that shows common validation regexes and match results for input text.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [CORS Config Generator — Browser Developer Tool](https://utillica.com/en/cors-config-generator): CORS Config Generator is a browser-based developer workflow tool that generates example cors response headers from a request scenario.
  Sources: MDN Web Docs: Client-side web APIs; MDN Web Docs: Cross-Origin Resource Sharing (CORS)
- [docker run to Compose Converter — Browser DevOps Tool](https://utillica.com/en/docker-run-to-compose): docker run to Compose Converter is a browser-based DevOps helper that turns a single docker run command into a compose service draft.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification; Docker Docs: Compose file reference
- [crontab ↔ systemd Timer Converter — Browser DevOps Tool](https://utillica.com/en/crontab-systemd-timer): crontab ↔ systemd Timer Converter is a browser-based DevOps helper that converts between one cron line and a basic systemd oncalendar timer.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification; systemd.timer manual
- [CSP Builder and Analyzer — Browser DevOps Tool](https://utillica.com/en/csp-builder): CSP Builder and Analyzer is a browser-based DevOps helper that builds a content-security-policy header draft with review notes.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification; MDN Web Docs: Content-Security-Policy
- [curl to Code Converter — Browser DevOps Tool](https://utillica.com/en/curl-to-code): curl to Code Converter is a browser-based DevOps helper that turns a curl command into fetch, axios, or python requests code drafts.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification; curl manual
- [Regex Explainer — Browser DevOps Tool](https://utillica.com/en/regex-explainer): Regex Explainer is a browser-based DevOps helper that explains javascript regular expressions as token-level notes.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification; MDN Web Docs: Regular expressions
- [TOTP Secret and QR Generator — Browser DevOps Tool](https://utillica.com/en/totp-secret-generator): TOTP Secret and QR Generator is a browser-based DevOps helper that generates a totp base32 secret, otpauth uri, and qr code in the browser.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification; RFC 6238: Time-Based One-Time Password Algorithm
- [Korean Dummy Data Generator — Browser Developer Helper](https://utillica.com/en/korean-dummy-data-generator): Korean Dummy Data Generator is a browser-based developer helper that generates korean test names, example emails, reserved phone numbers, and fictional addresses.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [AI Answer Verifier — Browser Developer Helper](https://utillica.com/en/ai-answer-verifier): AI Answer Verifier is a browser-based developer helper that compares numeric, json, and text answers from an ai response against an expected value locally.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Widget Result Badge Generator — Browser Developer Helper](https://utillica.com/en/widget-result-badge-generator): Widget Result Badge Generator is a browser-based developer helper that turns a result value into svg, markdown, or html badges for docs and external widgets.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification; MDN Web Docs: SVG

## Text

Category hub: https://utillica.com/en/category/text

- [Word Counter — Characters, Words, Bytes](https://utillica.com/en/word-counter): A word counter tallies characters, words, lines, characters-without-spaces and bytes of text in real time.
  Sources: TextEncoder
- [Case Converter — Browser Text Tool](https://utillica.com/en/case-converter): Case Converter is a browser text tool that converts text to uppercase, lowercase, or title case.
  Sources: MDN Web Docs: Client-side web APIs
- [Developer Case Converter — Browser Text Tool](https://utillica.com/en/dev-case): Developer Case Converter is a browser text tool that converts phrases to camelcase, pascalcase, kebab-case, or snake_case.
  Sources: MDN Web Docs: Client-side web APIs
- [Remove Duplicate Lines — Browser Text Tool](https://utillica.com/en/remove-duplicate-lines): Remove Duplicate Lines is a browser text tool that keeps only the first occurrence of each line.
  Sources: MDN Web Docs: Client-side web APIs
- [Sort Lines — Browser Text Tool](https://utillica.com/en/sort-lines): Sort Lines is a browser text tool that sorts lines in ascending or descending order.
  Sources: MDN Web Docs: Client-side web APIs
- [Add Line Numbers — Browser Text Tool](https://utillica.com/en/add-line-numbers): Add Line Numbers is a browser text tool that prefixes each line with a line number.
  Sources: MDN Web Docs: Client-side web APIs
- [Remove Line Breaks — Browser Text Tool](https://utillica.com/en/remove-line-breaks): Remove Line Breaks is a browser text tool that replaces line breaks with spaces.
  Sources: MDN Web Docs: Client-side web APIs
- [Whitespace Cleaner — Browser Text Tool](https://utillica.com/en/remove-whitespace): Whitespace Cleaner is a browser text tool that collapses repeated whitespace or removes all whitespace.
  Sources: MDN Web Docs: Client-side web APIs
- [Text Repeater — Browser Text Tool](https://utillica.com/en/text-repeat): Text Repeater is a browser text tool that repeats input text a selected number of times.
  Sources: MDN Web Docs: Client-side web APIs
- [Reverse Text — Browser Text Tool](https://utillica.com/en/reverse-text): Reverse Text is a browser text tool that reverses characters or word order.
  Sources: MDN Web Docs: Client-side web APIs
- [Word Frequency Counter — Browser Text Tool](https://utillica.com/en/word-frequency): Word Frequency Counter is a browser text tool that counts how often each word appears.
  Sources: MDN Web Docs: Client-side web APIs
- [Character Frequency Counter — Browser Text Tool](https://utillica.com/en/char-frequency): Character Frequency Counter is a browser text tool that counts how often each character appears.
  Sources: MDN Web Docs: Client-side web APIs
- [Slug Generator — Browser Text Tool](https://utillica.com/en/slug-generator): Slug Generator is a browser text tool that converts a title to a url-friendly slug.
  Sources: MDN Web Docs: Client-side web APIs
- [Line Counter — Browser Text Tool](https://utillica.com/en/line-counter): Line Counter is a browser text tool that counts total and non-empty lines.
  Sources: MDN Web Docs: Client-side web APIs
- [Korean Manuscript Paper Counter — Browser Text Tool](https://utillica.com/en/manuscript-pages): Korean Manuscript Paper Counter is a browser text tool that estimates pages on 200-character korean manuscript paper.
  Sources: MDN Web Docs: Client-side web APIs
- [SNS Character Counter — Browser Text Tool](https://utillica.com/en/sns-counter): SNS Character Counter is a browser text tool that checks character counts against common sns limits.
  Sources: MDN Web Docs: Client-side web APIs
- [Markdown Table Generator — Browser Text Tool](https://utillica.com/en/markdown-table): Markdown Table Generator is a browser text tool that converts csv-like text to a markdown table.
  Sources: MDN Web Docs: Client-side web APIs
- [CSV Text Cleaner — Browser Text Tool](https://utillica.com/en/csv-cleaner): CSV Text Cleaner is a browser text tool that cleans cell spacing and line formatting in csv text.
  Sources: MDN Web Docs: Client-side web APIs
- [Text Diff — Browser Text Tool](https://utillica.com/en/text-diff): Text Diff is a browser text tool that compares two text blocks line by line.
  Sources: MDN Web Docs: Client-side web APIs
- [Lorem Ipsum Generator — Browser Text Tool](https://utillica.com/en/lorem-ipsum): Lorem Ipsum Generator is a browser text tool that generates placeholder paragraphs.
  Sources: MDN Web Docs: Client-side web APIs
- [ROT13 Converter — Browser Text Tool](https://utillica.com/en/rot13): ROT13 Converter is a browser text tool that applies rot13 to english letters.
  Sources: MDN Web Docs: Client-side web APIs
- [Caesar Cipher Converter — Browser Text Tool](https://utillica.com/en/caesar-cipher): Caesar Cipher Converter is a browser text tool that shifts english letters by the selected amount.
  Sources: MDN Web Docs: Client-side web APIs
- [Morse Code Converter — Browser Text Tool](https://utillica.com/en/morse-code): Morse Code Converter is a browser text tool that converts letters and numbers to morse code.
  Sources: MDN Web Docs: Client-side web APIs
- [Thousands Separator Formatter — Browser Text Tool](https://utillica.com/en/number-formatter): Thousands Separator Formatter is a browser text tool that adds locale-aware thousands separators to a number.
  Sources: MDN Web Docs: Client-side web APIs
- [Find and Replace — Text String Replacement](https://utillica.com/en/find-replace): Find and replace is a text tool that replaces every occurrence of a specific string with another string.
  Sources: MDN Web Docs: Client-side web APIs
- [Hangul Initials Extractor — Korean Text Converter](https://utillica.com/en/hangul-initials): Hangul Initials Extractor is a Korean text tool that extracts initial consonants from hangul syllables.
  Sources: MDN Web Docs: Client-side web APIs
- [Hangul Romanizer — Korean Text Converter](https://utillica.com/en/hangul-romanize): Hangul Romanizer is a Korean text tool that converts hangul to simple romanized text.
  Sources: National Institute of Korean Language (국립국어원): Romanization of Korean
- [Number to Korean Words — Korean Text Converter](https://utillica.com/en/number-to-korean): Number to Korean Words is a Korean text tool that converts numbers to korean words.
  Sources: MDN Web Docs: Client-side web APIs
- [Keyword Density Checker — Browser Text Analysis](https://utillica.com/en/keyword-density): Keyword Density Checker is a browser text tool that counts word frequency and keyword density percentages.
  Sources: MDN Web Docs: Client-side web APIs
- [Readability Calculator — Browser Text Analysis](https://utillica.com/en/readability-score): Readability Calculator is a browser text tool that calculates flesch reading ease and flesch-kincaid grade.
  Sources: MDN Web Docs: Client-side web APIs
- [Sentence Counter — Browser Text Analysis](https://utillica.com/en/sentence-counter): Sentence Counter is a browser text tool that counts sentences, words, paragraphs, and average sentence length.
  Sources: MDN Web Docs: Client-side web APIs
- [Bionic Reading Converter — Browser Text Analysis](https://utillica.com/en/bionic-reading): Bionic Reading Converter is a browser text tool that creates an emphasized html preview and plain text variant.
  Sources: MDN Web Docs: Client-side web APIs
- [Text to Handwriting — Browser Text Transform](https://utillica.com/en/text-to-handwriting): Text to Handwriting is a client-side text tool that renders text as a handwriting-style canvas image.
  Sources: MDN Web Docs: Client-side web APIs
- [NATO Phonetic Alphabet Converter — Browser Text Transform](https://utillica.com/en/nato-phonetic): NATO Phonetic Alphabet Converter is a client-side text tool that converts a to alpha and can reverse alpha bravo to ab.
  Sources: MDN Web Docs: Client-side web APIs
- [Email Normalizer — Browser Text Transform](https://utillica.com/en/email-normalizer): Email Normalizer is a client-side text tool that normalizes domains and gmail dot/plus aliases.
  Sources: MDN Web Docs: Client-side web APIs
- [List Converter — Browser Text Transform](https://utillica.com/en/list-converter): List Converter is a client-side text tool that sorts, deduplicates, joins as csv, or extracts the first column.
  Sources: MDN Web Docs: Client-side web APIs
- [PDF Summarizer — AI Text Tool](https://utillica.com/en/pdf-summarizer): PDF Summarizer sends input to a /api AI job and summarizes pdfs and extracts key points.
  Sources: Utillica AI tools provider and retention policy
- [Text Summarizer — AI Text Tool](https://utillica.com/en/text-summarizer): Text Summarizer sends input to a /api AI job and summarizes text into a shorter result.
  Sources: Utillica AI tools provider and retention policy
- [Text Rewriter — AI Text Tool](https://utillica.com/en/text-rewriter): Text Rewriter sends input to a /api AI job and rewrites text for a selected tone.
  Sources: Utillica AI tools provider and retention policy
- [Grammar Fixer — AI Text Tool](https://utillica.com/en/grammar-fixer): Grammar Fixer sends input to a /api AI job and fixes grammar and expression issues.
  Sources: Utillica AI tools provider and retention policy
- [Online Notepad — Autosave, Character Count, TXT Download](https://utillica.com/en/online-notepad): An online notepad is a free browser tool for writing notes instantly, with the content autosaved to localStorage in the current browser — no install or account needed.
  Sources: Web Storage API (localStorage)
- [Cover Letter Multi-Question Counter — Characters, Bytes, Autosave](https://utillica.com/en/cover-letter-counter): A cover letter multi-question counter splits multiple application answers by heading, counts characters, no-space characters, UTF-8 bytes, and words per section, and autosaves locally in the browser.
  Sources: MDN Web Docs: Client-side web APIs; TextEncoder
- [Reading Time Calculator — Silent, Read-Aloud, Presentation](https://utillica.com/en/reading-time): A reading time calculator estimates duration by dividing word count by a words-per-minute speed for the selected mode.
  Sources: MDN Web Docs: Client-side web APIs
- [Markdown TOC Generator — Heading Anchor Links](https://utillica.com/en/markdown-toc): A Markdown TOC generator finds heading lines and turns them into an indented list of anchor links.
  Sources: MDN Web Docs: Client-side web APIs
- [Zero-Width Character Cleaner — Reveal and Remove Hidden Text](https://utillica.com/en/zero-width-cleaner): A zero-width character cleaner finds invisible Unicode format characters in text and either reveals or removes them.
  Sources: MDN Web Docs: Client-side web APIs
- [Punctuation Normalizer — Quotes, Ellipses, Dashes](https://utillica.com/en/punctuation-normalizer): A punctuation normalizer applies consistent quote, dash, ellipsis, and whitespace rules to pasted text.
  Sources: MDN Web Docs: Client-side web APIs
- [Hangul IPA Converter — Browser Content Tool](https://utillica.com/en/hangul-ipa-converter): Hangul IPA Converter is a browser-based content helper that converts hangul syllables into a simple approximate ipa notation.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification; International Phonetic Association: IPA charts
- [Text to ASCII Art — Browser Content Tool](https://utillica.com/en/ascii-art-text): Text to ASCII Art is a browser-based content helper that turns letters and numbers into a monospace ascii banner.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Emoji and Symbol Combo Dictionary — Browser Content Tool](https://utillica.com/en/emoji-combo-dictionary): Emoji and Symbol Combo Dictionary is a browser-based content helper that finds emoji and symbol combinations from a static searchable dictionary.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification; Unicode Standard: Emoji
- [Presentation Script Timer — Browser Content Tool](https://utillica.com/en/presentation-script-timer): Presentation Script Timer is a browser-based content helper that estimates per-section presentation time and cumulative timeline from a script.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Local Plagiarism Risk Self-Check — Browser Content Tool](https://utillica.com/en/local-plagiarism-risk-check): Local Plagiarism Risk Self-Check is a browser-based content helper that checks local n-gram similarity between two texts or repeated phrases inside one document.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification

## Date & Time

Category hub: https://utillica.com/en/category/datetime

- [D-Day Calculator — Date Calculator](https://utillica.com/en/dday): D-Day Calculator is a date tool that calculates days remaining until or elapsed since a target date.
  Sources: ECMAScript Language Specification
- [Date Difference Calculator — Date Calculator](https://utillica.com/en/date-diff): Date Difference Calculator is a date tool that calculates the number of days between two dates.
  Sources: ECMAScript Language Specification
- [Age Calculator — Date Calculator](https://utillica.com/en/age): Age Calculator is a date tool that calculates age and days lived from a birth date.
  Sources: ECMAScript Language Specification
- [Korean Age Calculator — International (Man) Age](https://utillica.com/en/korean-age): Korean Legal Age Calculator is a date tool that calculates legal age from a birth date.
  Sources: Administrative Basic Act — age calculation standard (man-nai unification); ECMAScript Language Specification
- [Weekday Calculator — Date Calculator](https://utillica.com/en/weekday): Weekday Calculator is a date tool that finds the weekday for a specific date.
  Sources: ECMAScript Language Specification
- [Week Number Calculator — Date Calculator](https://utillica.com/en/week-number): Week Number Calculator is a date tool that finds the iso week number and day of year for a date.
  Sources: ECMAScript Language Specification
- [Date Add/Subtract — Base Date ± Days](https://utillica.com/en/date-add): A date add/subtract calculator finds the result date after adding an integer number of days to a base date.
  Sources: ECMAScript Language Specification
- [Business Days Calculator — Weekdays Excluding Weekends and Holidays](https://utillica.com/en/business-days): A business days calculator counts weekdays between two dates while excluding Saturdays, Sundays, and holiday dates entered by the user.
  Sources: ECMAScript Language Specification
- [Timezone Converter — UTC Offset Time Conversion](https://utillica.com/en/timezone): A timezone converter changes a date and time from one UTC offset basis to another UTC offset basis.
  Sources: ECMAScript Language Specification
- [World Clock — Current Time in Major Cities](https://utillica.com/en/world-clock): A world clock shows current times for common UTC offset regions from your browser time.
  Sources: ECMAScript Language Specification
- [12/24 Hour Converter — AM/PM and Military Time](https://utillica.com/en/military-time): A 12/24 hour converter changes time between AM/PM notation and 00:00 to 23:59 notation.
  Sources: ECMAScript Language Specification
- [Time Duration Calculator — HH:MM Time Calculator](https://utillica.com/en/time-duration): A time duration calculator adds multiple HH:MM duration values and returns the total elapsed time.
  Sources: ECMAScript Language Specification
- [Time Difference Calculator — HH:MM Time Calculator](https://utillica.com/en/time-diff): A time difference calculator finds the elapsed time between a start time and an end time.
  Sources: ECMAScript Language Specification
- [Countdown Calculator — Event Date Calculator](https://utillica.com/en/countdown): Countdown Calculator is a date tool that calculates time remaining until a target date and time.
  Sources: ECMAScript Language Specification
- [Anniversary Calculator — Event Date Calculator](https://utillica.com/en/anniversary): Anniversary Calculator is a date tool that calculates years elapsed and days until the next anniversary.
  Sources: ECMAScript Language Specification
- [100 Days Calculator — Event Date Calculator](https://utillica.com/en/hundred-days): 100 Days Calculator is a date tool that calculates the 100th day from a start date.
  Sources: ECMAScript Language Specification
- [Pregnancy Week Calculator — Estimated Date Calculator](https://utillica.com/en/pregnancy-week): Pregnancy Week Calculator is a date tool that estimates current gestational age and due date from the last menstrual period and cycle information.
  Sources: ACOG: Methods for Estimating the Due Date; Johns Hopkins Medicine: Calculating a Due Date
- [Pregnancy Due Date Calculator — Estimated Date Calculator](https://utillica.com/en/pregnancy-due): Pregnancy Due Date Calculator is a date tool that estimates a due date from the last menstrual period from the last menstrual period and cycle information.
  Sources: ACOG: Methods for Estimating the Due Date; Johns Hopkins Medicine: Calculating a Due Date
- [Ovulation Calculator — Estimated Date Calculator](https://utillica.com/en/ovulation): Ovulation Calculator is a date tool that estimates ovulation date and fertile window from average cycle length from the last menstrual period and cycle information.
  Sources: Office on Women’s Health: Ovulation Calculator
- [Zodiac Sign Calculator — Date Based Calculator](https://utillica.com/en/zodiac): Zodiac Sign Calculator is a date tool that finds the western zodiac sign from a birthday.
  Sources: ECMAScript Language Specification
- [Korean Zodiac Calculator — Date Based Calculator](https://utillica.com/en/korean-zodiac): Korean Zodiac Calculator is a date tool that calculates the twelve-animal zodiac from birth year.
  Sources: ECMAScript Language Specification
- [CSAT D-Day Calculator — Date Based Calculator](https://utillica.com/en/school-dday): CSAT D-Day Calculator is a date tool that calculates days remaining until the 2027 korean csat.
  Sources: Ministry of Education (교육부): 2027 Korean CSAT date
- [Military Discharge Date Calculator — Date Based Calculator](https://utillica.com/en/military-discharge): Military Discharge Date Calculator is a date tool that calculates an estimated discharge date from enlistment date and service months.
  Sources: ECMAScript Language Specification
- [Timer — Minute and Second Countdown](https://utillica.com/en/timer): A timer is a browser tool that counts down by one second from a specified duration.
  Sources: MDN Web Docs: Client-side web APIs
- [Stopwatch — Measure Elapsed Time](https://utillica.com/en/stopwatch): A stopwatch is a browser tool that measures elapsed time from a start moment to now.
  Sources: MDN Web Docs: Client-side web APIs
- [Moon Phase Calculator — Today's Moon, Illumination, Full Moon Dates](https://utillica.com/en/moon-phase): A moon phase calculator computes the lunar phase (new, crescent, quarter, gibbous, full) and illumination percent for a selected date using the mean synodic month approximation.
  Sources: Phases of the Moon; Six Millennium Catalog of Phases of the Moon (computed with Meeus algorithms)
- [Sunrise Sunset Calculator — Sun Times by City or Coordinates](https://utillica.com/en/sunrise-sunset): A sunrise sunset calculator computes sunrise, sunset, solar noon, and day length from a date and latitude/longitude using the NOAA solar position equations.
  Sources: NOAA Solar Calculator; NOAA Solar Calculation Details (sunrise/sunset equations)
- [Meeting Planner — Multi-City Time Zone Overlap Finder](https://utillica.com/en/meeting-planner): A meeting planner compares the UTC offsets of two to five cities and shows, in a 24-hour table, the meeting slots where every city falls inside working hours (09:00–18:00).
  Sources: IANA Time Zone Database; ECMAScript Language Specification
- [Calendar Generator — Printable Monthly and Yearly Calendar with Korean Holidays](https://utillica.com/en/calendar-generator): A calendar generator builds a printable monthly or yearly Gregorian calendar in your browser with Korean public holidays marked.
  Sources: 관공서의 공휴일에 관한 규정 (Regulations on Public Holidays of Government Offices); ECMAScript Language Specification
- [Korean Lunar-Solar Calendar Converter — Leap Months and Ganji (Sexagenary Cycle)](https://utillica.com/en/lunar-solar-converter): A Korean lunar-solar converter changes dates between the Korean lunisolar calendar and the Gregorian calendar, showing leap-month status and the ganji (sexagenary cycle) names.
  Sources: 음양력 변환 계산 (Lunar-Solar Conversion); korean-lunar-calendar — KASI-based conversion table library
- [Son-eomneun-nal Calendar — Korean Moving Lucky Days](https://utillica.com/en/son-eomneun-nal-calendar): A son-eomneun-nal calendar converts each date in a selected Gregorian month to the Korean lunar calendar and lists lunar days 9, 10, 19, 20, 29, and 30.
  Sources: 음양력 변환 계산 (Lunar-Solar Conversion); korean-lunar-calendar — KASI-based conversion table library; MDN Web Docs: Client-side web APIs
- [RRULE Generator — Recurring Calendar String Builder](https://utillica.com/en/rrule-generator): An RRULE generator turns recurring schedule options into an iCalendar RRULE string.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Workday Countdown — Business Days Until a Target](https://utillica.com/en/workday-countdown): A workday countdown counts weekdays from today to a target date and subtracts holidays entered by the user.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Moving Checklist Generator — Browser Schedule Tool](https://utillica.com/en/moving-checklist): Moving Checklist Generator is a browser-based schedule and date tool that generates a d-30 through d+7 moving checklist from a move date.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [ICS Event Generator — Browser Schedule Tool](https://utillica.com/en/ics-event-generator): ICS Event Generator is a browser-based schedule and date tool that generates an icalendar .ics event from title, start date/time, and duration.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Project Backward Scheduler — Browser Schedule Tool](https://utillica.com/en/project-backward-scheduler): Project Backward Scheduler is a browser-based schedule and date tool that works backward from a deadline to generate milestone dates.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Age and Zodiac Compare — Browser Schedule Tool](https://utillica.com/en/age-zodiac-compare): Age and Zodiac Compare is a browser-based schedule and date tool that compares legal age difference and korean zodiac animals for two birth dates.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Tenure Calculator — Browser Schedule Tool](https://utillica.com/en/tenure-calculator): Tenure Calculator is a browser-based schedule and date tool that calculates tenure duration and time until next anniversary from a hire date.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Jet Lag Planner — Browser Time Planning Tool](https://utillica.com/en/jet-lag-planner): Jet Lag Planner is a browser-based time planning tool that generates a sleep and light exposure adjustment plan from origin and destination utc offsets.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Meeting Invitation Message Generator — Browser Time Planning Tool](https://utillica.com/en/meeting-invite-message): Meeting Invitation Message Generator is a browser-based time planning tool that generates meeting invitation copy and calendar notes from meeting time and agenda.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Timezone Overlap Heatmap — Browser Time Planning Tool](https://utillica.com/en/timezone-overlap-heatmap): Timezone Overlap Heatmap is a browser-based time planning tool that shows working-hour overlap across multiple utc offsets as a 24-hour table.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification

## Color

Category hub: https://utillica.com/en/category/color

- [HEX to RGB Converter](https://utillica.com/en/hex-to-rgb): A HEX to RGB converter changes a #RRGGBB color code into red, green, and blue numeric values.
  Sources: ECMAScript Language Specification
- [HEX to HSL Converter](https://utillica.com/en/hex-to-hsl): A HEX to HSL converter changes a HEX color into hue, saturation, and lightness values.
  Sources: ECMAScript Language Specification
- [Random Color Generator — HEX Color](https://utillica.com/en/random-color): A random color generator creates a random HEX color code and shows RGB and HSL values.
  Sources: ECMAScript Language Specification
- [Color Picker — Color and Design Calculator](https://utillica.com/en/color-picker): Color Picker is a browser-based design utility that uses a browser color input to inspect hex, rgb, and hsl values.
  Sources: ECMAScript Language Specification
- [RGB to CMYK Converter — Color and Design Calculator](https://utillica.com/en/rgb-to-cmyk): RGB to CMYK Converter is a browser-based design utility that converts rgb colors to cmyk percentages.
  Sources: ECMAScript Language Specification
- [Palette Generator — Color and Design Calculator](https://utillica.com/en/palette-generator): Palette Generator is a browser-based design utility that generates a harmonious palette from a base hex color.
  Sources: ECMAScript Language Specification
- [Gradient Generator — Color and Design Calculator](https://utillica.com/en/gradient-generator): Gradient Generator is a browser-based design utility that generates a css linear-gradient from two hex colors.
  Sources: ECMAScript Language Specification
- [Color Mixer — Color and Design Calculator](https://utillica.com/en/color-mixer): Color Mixer is a browser-based design utility that mixes two hex colors by a chosen ratio.
  Sources: ECMAScript Language Specification
- [Tint and Shade Generator — Color and Design Calculator](https://utillica.com/en/shades-generator): Tint and Shade Generator is a browser-based design utility that generates lighter tints and darker shades for a hex color.
  Sources: ECMAScript Language Specification
- [CSS Named Color Lookup — Color and Design Calculator](https://utillica.com/en/named-colors): CSS Named Color Lookup is a browser-based design utility that looks up hex and rgb values for css named colors.
  Sources: ECMAScript Language Specification
- [Tailwind Color Match — Color and Design Calculator](https://utillica.com/en/tailwind-color-match): Tailwind Color Match is a browser-based design utility that finds a close tailwind default color token for a hex color.
  Sources: ECMAScript Language Specification
- [Opacity Color Calculator — Color and Design Calculator](https://utillica.com/en/opacity-color): Opacity Color Calculator is a browser-based design utility that converts a hex color and opacity to css rgba.
  Sources: ECMAScript Language Specification
- [Box-shadow Generator — Color and Design Calculator](https://utillica.com/en/box-shadow-generator): Box-shadow Generator is a browser-based design utility that generates css box-shadow from offsets, blur, spread, and color.
  Sources: ECMAScript Language Specification
- [Border Radius Preview — Color and Design Calculator](https://utillica.com/en/border-radius-preview): Border Radius Preview is a browser-based design utility that builds css border-radius from four corner values.
  Sources: ECMAScript Language Specification
- [CSS Clamp Generator — Color and Design Calculator](https://utillica.com/en/css-clamp-generator): CSS Clamp Generator is a browser-based design utility that combines minimum, preferred, and maximum values into css clamp().
  Sources: ECMAScript Language Specification
- [REM PX Converter — Color and Design Calculator](https://utillica.com/en/rem-px): REM PX Converter is a browser-based design utility that converts between px and rem using a base font size.
  Sources: ECMAScript Language Specification
- [Aspect Ratio Calculator — Color and Design Calculator](https://utillica.com/en/aspect-ratio): Aspect Ratio Calculator is a browser-based design utility that calculates css aspect-ratio from width and height.
  Sources: ECMAScript Language Specification
- [Tailwind Color Generator — Design Generator](https://utillica.com/en/tailwind-color-generator): Tailwind Color Generator is a client-side tool that generates a 50-950 scale from a base color.
  Sources: MDN Web Docs: Client-side web APIs
- [Palette Visualizer — Design Generator](https://utillica.com/en/palette-visualizer): Palette Visualizer is a client-side tool that visualizes a palette in generic ui blocks.
  Sources: MDN Web Docs: Client-side web APIs
- [Color Name Finder — Design Generator](https://utillica.com/en/color-name-finder): Color Name Finder is a client-side tool that finds a nearby named color for a hex value.
  Sources: MDN Web Docs: Client-side web APIs
- [CSS Triangle Generator — Design Generator](https://utillica.com/en/css-triangle-generator): CSS Triangle Generator is a client-side tool that generates css border triangle code.
  Sources: MDN Web Docs: Client-side web APIs
- [Color Contrast Checker — WCAG AA/AAA](https://utillica.com/en/contrast-checker): A color contrast checker compares relative luminance of foreground and background colors to calculate WCAG contrast ratio and pass/fail results.
  Sources: Web Content Accessibility Guidelines (WCAG) 2.2
- [Image Palette Extractor — Browser Color Analysis](https://utillica.com/en/color-from-image): Image Palette Extractor is a browser-based color analysis tool that extracts a representative hex color palette from an image.
  Sources: MDN Web Docs: Client-side web APIs
- [Color Blindness Simulator — Browser Color Analysis](https://utillica.com/en/color-blindness): Color Blindness Simulator is a browser-based color analysis tool that simulates common color-vision deficiency types for a hex color.
  Sources: MDN Web Docs: Client-side web APIs

## Image

Category hub: https://utillica.com/en/category/image

- [Image Resizer — Browser Image Tool](https://utillica.com/en/image-resize): Image Resizer is a browser-based image tool that resizes an image by maximum width while preserving aspect ratio.
  Sources: MDN Web Docs: Client-side web APIs
- [Image Compressor — Browser Image Tool](https://utillica.com/en/image-compress): Image Compressor is a browser-based image tool that compresses an image by re-encoding it as jpeg.
  Sources: MDN Web Docs: Client-side web APIs
- [Image Cropper — Browser Image Tool](https://utillica.com/en/image-crop): Image Cropper is a browser-based image tool that crops a selected rectangle from an image.
  Sources: MDN Web Docs: Client-side web APIs
- [Image Rotator — Browser Image Tool](https://utillica.com/en/image-rotate): Image Rotator is a browser-based image tool that rotates an image in 90-degree steps.
  Sources: MDN Web Docs: Client-side web APIs
- [Image Metadata Remover — Browser Image Tool](https://utillica.com/en/image-metadata-remove): Image Metadata Remover is a browser-based image tool that removes embedded metadata by redrawing the image to canvas.
  Sources: MDN Web Docs: Client-side web APIs
- [Image Base64 Converter — Browser Image Tool](https://utillica.com/en/image-base64): Image Base64 Converter is a browser-based image tool that converts an image to a base64 data url text file.
  Sources: MDN Web Docs: Client-side web APIs
- [HEIC to JPG Converter — Browser Image Format Tool](https://utillica.com/en/heic-to-jpg): The HEIC to JPG converter decodes a HEIC image in the browser, redraws it on Canvas, and encodes it as a JPG file.
  Sources: MDN Web Docs: Client-side web APIs
- [HEIC to PNG Converter — Browser Image Format Tool](https://utillica.com/en/heic-to-png): The HEIC to PNG converter decodes a HEIC image in the browser, redraws it on Canvas, and encodes it as a PNG file.
  Sources: MDN Web Docs: Client-side web APIs
- [HEIC to WebP Converter — Browser Image Format Tool](https://utillica.com/en/heic-to-webp): The HEIC to WebP converter decodes a HEIC image in the browser, redraws it on Canvas, and encodes it as a WebP file.
  Sources: MDN Web Docs: Client-side web APIs
- [HEIF to JPG Converter — Browser Image Format Tool](https://utillica.com/en/heif-to-jpg): The HEIF to JPG converter decodes a HEIF image in the browser, redraws it on Canvas, and encodes it as a JPG file.
  Sources: MDN Web Docs: Client-side web APIs
- [AVIF to JPG Converter — Browser Image Format Tool](https://utillica.com/en/avif-to-jpg): The AVIF to JPG converter decodes a AVIF image in the browser, redraws it on Canvas, and encodes it as a JPG file.
  Sources: MDN Web Docs: Client-side web APIs
- [AVIF to PNG Converter — Browser Image Format Tool](https://utillica.com/en/avif-to-png): The AVIF to PNG converter decodes a AVIF image in the browser, redraws it on Canvas, and encodes it as a PNG file.
  Sources: MDN Web Docs: Client-side web APIs
- [JPG to AVIF Converter — Browser Image Format Tool](https://utillica.com/en/jpg-to-avif): The JPG to AVIF converter decodes a JPG image in the browser, redraws it on Canvas, and encodes it as a AVIF file.
  Sources: MDN Web Docs: Client-side web APIs
- [PNG to AVIF Converter — Browser Image Format Tool](https://utillica.com/en/png-to-avif): The PNG to AVIF converter decodes a PNG image in the browser, redraws it on Canvas, and encodes it as a AVIF file.
  Sources: MDN Web Docs: Client-side web APIs
- [WebP to AVIF Converter — Browser Image Format Tool](https://utillica.com/en/webp-to-avif): The WebP to AVIF converter decodes a WebP image in the browser, redraws it on Canvas, and encodes it as a AVIF file.
  Sources: MDN Web Docs: Client-side web APIs
- [WebP to JPG Converter — Browser Image Format Tool](https://utillica.com/en/webp-to-jpg): The WebP to JPG converter decodes a WebP image in the browser, redraws it on Canvas, and encodes it as a JPG file.
  Sources: MDN Web Docs: Client-side web APIs
- [WebP to PNG Converter — Browser Image Format Tool](https://utillica.com/en/webp-to-png): The WebP to PNG converter decodes a WebP image in the browser, redraws it on Canvas, and encodes it as a PNG file.
  Sources: MDN Web Docs: Client-side web APIs
- [JPG to WebP Converter — Browser Image Format Tool](https://utillica.com/en/jpg-to-webp): The JPG to WebP converter decodes a JPG image in the browser, redraws it on Canvas, and encodes it as a WebP file.
  Sources: MDN Web Docs: Client-side web APIs
- [PNG to WebP Converter — Browser Image Format Tool](https://utillica.com/en/png-to-webp): The PNG to WebP converter decodes a PNG image in the browser, redraws it on Canvas, and encodes it as a WebP file.
  Sources: MDN Web Docs: Client-side web APIs
- [PNG to JPG Converter — Browser Image Format Tool](https://utillica.com/en/png-to-jpg): The PNG to JPG converter decodes a PNG image in the browser, redraws it on Canvas, and encodes it as a JPG file.
  Sources: MDN Web Docs: Client-side web APIs
- [JPG to PNG Converter — Browser Image Format Tool](https://utillica.com/en/jpg-to-png): The JPG to PNG converter decodes a JPG image in the browser, redraws it on Canvas, and encodes it as a PNG file.
  Sources: MDN Web Docs: Client-side web APIs
- [JPG to WebP Converter — Browser Image Format Tool](https://utillica.com/en/webp-converter): The JPG to WebP converter decodes a JPG image in the browser, redraws it on Canvas, and encodes it as a WebP file.
  Sources: MDN Web Docs: Client-side web APIs
- [JPG to AVIF Converter — Browser Image Format Tool](https://utillica.com/en/avif-converter): The JPG to AVIF converter decodes a JPG image in the browser, redraws it on Canvas, and encodes it as a AVIF file.
  Sources: MDN Web Docs: Client-side web APIs
- [Background Remover — AI Image Tool](https://utillica.com/en/background-remover): Background Remover uploads a file to a /api AI job and removes image backgrounds into transparent png results.
  Sources: Utillica AI tools provider and retention policy
- [Image Upscaler — AI Image Tool](https://utillica.com/en/image-upscaler): Image Upscaler uploads a file to a /api AI job and processes images into upscaled results.
  Sources: Utillica AI tools provider and retention policy
- [OCR Image to Text — AI Image Tool](https://utillica.com/en/ocr-image-to-text): OCR Image to Text uploads a file to a /api AI job and extracts text from images or pdf pages.
  Sources: Utillica AI tools provider and retention policy
- [File Hash Calculator — Browser File Utility](https://utillica.com/en/file-hash): File Hash Calculator is a browser-based file utility that calculates sha-256 and sha-1 hashes for a file.
  Sources: MDN Web Docs: Client-side web APIs
- [EXIF Viewer — Browser File Utility](https://utillica.com/en/exif-viewer): EXIF Viewer is a browser-based file utility that reads basic exif tags from a jpeg image.
  Sources: MDN Web Docs: Client-side web APIs
- [File Size Converter — Browser File Utility](https://utillica.com/en/file-size-converter): File Size Converter is a browser-based file utility that converts bytes into kb, mb, gb, kib, and mib units.
  Sources: MDN Web Docs: Client-side web APIs
- [Filename Batch Cleaner — Browser File Utility](https://utillica.com/en/filename-cleaner): Filename Batch Cleaner is a browser-based file utility that cleans a filename list into safe kebab-case names.
  Sources: MDN Web Docs: Client-side web APIs
- [PDF to Word — Server File Conversion](https://utillica.com/en/pdf-to-word): PDF to Word uploads a file to a /api conversion job and converts pdf to docx.
  Sources: Utillica file conversion API retention policy
- [Word to PDF — Server File Conversion](https://utillica.com/en/word-to-pdf): Word to PDF uploads a file to a /api conversion job and converts doc or docx to pdf.
  Sources: Utillica file conversion API retention policy
- [PDF to Excel — Server File Conversion](https://utillica.com/en/pdf-to-excel): PDF to Excel uploads a file to a /api conversion job and converts pdf to xlsx.
  Sources: Utillica file conversion API retention policy
- [PPT to PDF — Server File Conversion](https://utillica.com/en/ppt-to-pdf): PPT to PDF uploads a file to a /api conversion job and converts ppt or pptx to pdf.
  Sources: Utillica file conversion API retention policy
- [MP4 to MP3 — Server File Conversion](https://utillica.com/en/mp4-to-mp3): MP4 to MP3 uploads a file to a /api conversion job and extracts mp3 audio from mp4.
  Sources: Utillica file conversion API retention policy
- [EPUB to PDF — Server File Conversion](https://utillica.com/en/epub-to-pdf): EPUB to PDF uploads a file to a /api conversion job and converts epub ebooks to pdf.
  Sources: Utillica file conversion API retention policy
- [ZIP Extract — Server File Conversion](https://utillica.com/en/zip-extract): ZIP Extract uploads a file to a /api conversion job and checks zip archives and creates an extraction result.
  Sources: Utillica file conversion API retention policy
- [PDF Compress — Server File Conversion](https://utillica.com/en/pdf-compress): PDF Compress uploads a file to a /api conversion job and creates a compressed pdf result.
  Sources: Utillica file conversion API retention policy
- [Favicon Generator — Browser Image Asset Tool](https://utillica.com/en/favicon-generator): Favicon Generator is a browser-based image asset tool that generates 16, 32, and 48px favicon png files from an image.
  Sources: MDN Web Docs: Client-side web APIs
- [App Icon Size Generator — Browser Image Asset Tool](https://utillica.com/en/app-icon-generator): App Icon Size Generator is a browser-based image asset tool that generates 180, 192, and 512px app icon png files from an image.
  Sources: MDN Web Docs: Client-side web APIs
- [SVG Optimizer — Browser Image Asset Tool](https://utillica.com/en/svg-optimizer): SVG Optimizer is a browser-based image asset tool that removes comments and redundant whitespace from svg text.
  Sources: MDN Web Docs: Client-side web APIs
- [SVG to PNG Converter — Browser Image Asset Tool](https://utillica.com/en/svg-to-png): SVG to PNG Converter is a browser-based image asset tool that renders svg text into a png image.
  Sources: MDN Web Docs: Client-side web APIs
- [Social Post Image — Social Image Generator](https://utillica.com/en/tweet-to-image): Social Post Image is a tool that creates generic social post images from text.
  Sources: MDN Web Docs: Client-side web APIs
- [Meme Generator — Social Image Generator](https://utillica.com/en/meme-generator): Meme Generator is a tool that creates meme pngs from captions and an image reference.
  Sources: MDN Web Docs: Client-side web APIs
- [Noise and Film Grain Generator — Browser Image Asset Generator](https://utillica.com/en/noise-filmgrain-generator): Noise and Film Grain Generator is a browser-based image asset generator that generates a png noise texture from size and intensity settings.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [SVG Emoji Favicon Generator — Browser Image Asset Generator](https://utillica.com/en/svg-emoji-favicon-generator): SVG Emoji Favicon Generator is a browser-based image asset generator that generates an svg favicon from an emoji and background color.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [Sprite Sheet Generator — Browser Image Asset Generator](https://utillica.com/en/sprite-sheet-generator): Sprite Sheet Generator is a browser-based image asset generator that generates an svg sprite sheet grid from text or emoji items.
  Sources: MDN Web Docs: Client-side web APIs; ECMAScript Language Specification
- [ID Photo Cropper — Browser Image Editing Tool](https://utillica.com/en/id-photo-cropper): ID Photo Cropper is a client-side image editing tool that creates centered crops at common id and passport photo pixel sizes.
  Sources: MDN Web Docs: Client-side web APIs; MDN Web Docs: Canvas API
- [Batch Image Resize and Converter — Browser Image Editing Tool](https://utillica.com/en/image-batch-resize-converter): Batch Image Resize and Converter is a client-side image editing tool that resizes and converts multiple images in one browser batch.
  Sources: MDN Web Docs: Client-side web APIs; MDN Web Docs: Canvas API
- [Image Grid Splitter — Browser Image Editing Tool](https://utillica.com/en/image-grid-splitter): Image Grid Splitter is a client-side image editing tool that splits an image into row and column tile png files.
  Sources: MDN Web Docs: Client-side web APIs; MDN Web Docs: Canvas API
- [EXIF GPS Strip Checker — Browser Image Editing Tool](https://utillica.com/en/exif-gps-strip-checker): EXIF GPS Strip Checker is a client-side image editing tool that checks jpeg exif gps tags and creates a redrawn file without original metadata.
  Sources: MDN Web Docs: Client-side web APIs; MDN Web Docs: Canvas API
- [Audio Waveform Image Generator — Browser Media Image Tool](https://utillica.com/en/audio-waveform-image): Audio Waveform Image Generator is a client-side media image tool that generates a png waveform image from an audio file.
  Sources: MDN Web Docs: Client-side web APIs; MDN Web Docs: Web Audio API
- [GIF Frame Extractor and Rebuilder — Browser Image Tool](https://utillica.com/en/gif-frame-extractor-rebuilder): GIF Frame Extractor and Rebuilder decodes an animated GIF in the browser, exports frame PNGs, and encodes a rebuilt GIF.
  Sources: MDN Web Docs: Client-side web APIs; GIF89a Specification
- [Merge PDF — Combine PDF Files in Your Browser](https://utillica.com/en/pdf-merge): Merge PDF is a browser-based PDF tool that copies the pages of multiple PDF files, in the order you set, into a single PDF document.
  Sources: ISO 32000-2 — Portable Document Format (PDF 2.0); pdf-lib — Create and modify PDF documents in JavaScript; MDN Web Docs: Client-side web APIs
- [Split PDF — Divide by Page Ranges in Your Browser](https://utillica.com/en/pdf-split): Split PDF is a browser-based PDF tool that creates a separate PDF file for each page range you specify in a single source PDF.
  Sources: ISO 32000-2 — Portable Document Format (PDF 2.0); pdf-lib — Create and modify PDF documents in JavaScript; MDN Web Docs: Client-side web APIs
- [Rotate PDF — Turn Pages 90/180/270° in Your Browser](https://utillica.com/en/pdf-rotate): Rotate PDF is a browser-based PDF tool that changes the rotation value of all pages, or only the pages you specify, by 90, 180, or 270 degrees and saves a new PDF.
  Sources: ISO 32000-2 — Portable Document Format (PDF 2.0); pdf-lib — Create and modify PDF documents in JavaScript; MDN Web Docs: Client-side web APIs
- [Extract or Delete PDF Pages — New PDF in Your Browser](https://utillica.com/en/pdf-extract-pages): Extract PDF Pages is a browser-based PDF tool that copies only the pages you specify into a new PDF, or builds a new PDF from every page except the ones you specify.
  Sources: ISO 32000-2 — Portable Document Format (PDF 2.0); pdf-lib — Create and modify PDF documents in JavaScript; MDN Web Docs: Client-side web APIs
- [Add Page Numbers to PDF — Position, Start, Format (Browser)](https://utillica.com/en/pdf-page-numbers): Add Page Numbers to PDF is a browser-based PDF tool that stamps sequential page numbers, starting from a number you choose, at a chosen position on every page and saves a new PDF.
  Sources: ISO 32000-2 — Portable Document Format (PDF 2.0); pdf-lib — Create and modify PDF documents in JavaScript; MDN Web Docs: Client-side web APIs
- [PDF Watermark — Add Text Watermarks in Your Browser](https://utillica.com/en/pdf-watermark): PDF Watermark is a browser-based PDF tool that stamps the text you enter, with chosen opacity, size, and direction, across the center of every page and saves a new PDF.
  Sources: ISO 32000-2 — Portable Document Format (PDF 2.0); pdf-lib — Create and modify PDF documents in JavaScript; MDN Web Docs: Client-side web APIs
- [JPG to PDF — Convert Multiple Images to One PDF (Browser)](https://utillica.com/en/jpg-to-pdf): JPG to PDF is a browser-based converter that places multiple JPG and PNG images, one per page in the order you set, into a single PDF file.
  Sources: ISO 32000-2 — Portable Document Format (PDF 2.0); pdf-lib — Create and modify PDF documents in JavaScript; MDN Web Docs: Client-side web APIs
- [PDF to JPG — Save Each Page as an Image (Browser)](https://utillica.com/en/pdf-to-jpg): PDF to JPG is a browser-based converter that renders each page of a PDF and saves it as a per-page JPG or PNG image file.
  Sources: ISO 32000-2 — Portable Document Format (PDF 2.0); PDF.js — PDF rendering in JavaScript; MDN Web Docs: Client-side web APIs
- [PDF Page Reorder — Browser PDF Editing](https://utillica.com/en/pdf-reorder-pages): PDF Page Reorder is a browser-based PDF editing tool that copies pdf pages into a new pdf in the order you enter.
  Sources: ISO 32000-2 — Portable Document Format (PDF 2.0); pdf-lib — Create and modify PDF documents in JavaScript; MDN Web Docs: Client-side web APIs
- [PDF Form Filler — Browser PDF Editing](https://utillica.com/en/pdf-form-filler): PDF Form Filler is a browser-based PDF editing tool that fills acroform text, checkbox, radio, and choice fields from key=value input.
  Sources: ISO 32000-2 — Portable Document Format (PDF 2.0); pdf-lib — Create and modify PDF documents in JavaScript; MDN Web Docs: Client-side web APIs
- [PDF Signature Inserter — Browser PDF Editing](https://utillica.com/en/pdf-signature-inserter): PDF Signature Inserter is a browser-based PDF editing tool that places a visual signature text and line at chosen page coordinates.
  Sources: ISO 32000-2 — Portable Document Format (PDF 2.0); pdf-lib — Create and modify PDF documents in JavaScript; MDN Web Docs: Client-side web APIs

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