Category: Developer tools
MIME Type Lookup
Look up MIME types by file extension, or search by MIME string
Look up the MIME type for a file extension or filename, or search in the other direction to find every extension whose MIME type matches a keyword such as "image" or "json". Backed by a local mapping — no network request is made.
Everything on this page is processed in your browser. Nothing is uploaded.
What this tool does
A MIME type such as application/pdf or image/png tells a browser or server how to handle a file's content, and it shows up in Content-Type headers, file upload validation and email attachments. This tool covers common web, document, image, audio, video, font and archive formats in both directions: type in an extension to get its MIME type, or type part of a MIME type to see every extension that matches.
How to use it
- Switch between "By extension" and "By MIME type".
- Type a file extension, filename, or part of a MIME type.
- Read the matching MIME type or list of extensions.
Privacy
This tool runs entirely in your browser. Your input is never uploaded, stored or shared — closing the tab removes it.
Frequently asked questions
- Where does the mapping come from?
- A local table of common extension-to-MIME-type pairs bundled with the tool, covering the formats developers run into most often. It is not a live registry lookup.
- What if my extension isn't listed?
- Less common or vendor-specific formats may be missing; application/octet-stream is the standard fallback for an unrecognized binary file.
- Can I paste a full filename instead of just the extension?
- Yes — the extension is pulled off the end of a filename automatically, so "report.pdf" and "pdf" give the same result.