User-Agent Parser — Browser Developer Tool

Developer

User-Agent Parser is a browser-based developer tool that estimates browser, os, and device from a user-agent string.

User-Agent Parser

Runs in this browserInput is processed only in this browser. It is not sent to or stored on a server.

This is a User-Agent pattern estimate and can be inaccurate with reduced browser strings or bots.

User-Agent string

Parsed result

Next actions

HTTP Status Code Lookup Regex Tester

What is it

User-Agent Parser lets you paste code or strings and inspect the result immediately. It is useful for debugging, validation, and encoding tasks without server storage.

client = pattern match over User-Agent tokens

How to use

1Paste the input.
2Choose a mode if available.
3Read and copy the result.

Reference

User-Agent Parser — Browser Developer Tool Reference
Input	Result
sample	estimates browser, OS, and device from a User-Agent string

Sources & standards

MDN Web Docs: Client-side web APIs - MDN Web Docs
ECMAScript Language Specification - Ecma International

FAQ

Is User-Agent Parser input sent to a server?

No. This tool runs in your browser and does not send input to a server.

Can I use User-Agent Parser with sensitive values?

It runs in the browser, but avoid pasting tokens or passwords on shared devices or during screen sharing.