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MIME Type Lookup - Search File Extensions & Content-Type Headers

Quickly look up standardized HTTP Content-Type header strings and media types by searching file extensions or MIME names.

This tool runs in your browser.
Enter an extension to look it up.

How to use

  1. 01Enter an extension.
  2. 02Look up its MIME type.

FAQ

What is a MIME type and why does it matter in web protocols?

MIME types (e.g. application/json, image/webp) tell browsers the exact media format of transferred data so it renders or executes correctly.

What issues occur if a server sends an incorrect Content-Type?

Incorrect MIME types cause browsers to download pages as raw files, fail to render images, or block stylesheets due to strict MIME type sniffing rules.

Are modern web media and webfont formats covered?

Yes. It contains comprehensive mappings for modern formats including AVIF, WebP, WOFF2, SVG, WebM, and JSON-LD.