MIME Type Lookup — Browser Developer Tool

Developer

MIME Type Lookup is a browser-based developer tool that looks up mappings between file extensions and mime types.

MIME Type Lookup

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

This uses a built-in common MIME map and can differ from a server or OS MIME database.

Extension or MIME type: json

Lookup result

Next actions

HTTP Status Code Lookup HTML Entity Converter

What is it

MIME Type Lookup lets you paste code or strings and inspect the result immediately. It is useful for debugging, validation, and encoding tasks without server storage.

mime = known map[extension]

How to use

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

Reference

MIME Type Lookup — Browser Developer Tool Reference
Input	Result
sample	looks up mappings between file extensions and MIME types

Sources & standards

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

FAQ

Is MIME Type Lookup input sent to a server?

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

Can I use MIME Type Lookup with sensitive values?

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