About MIME types
This tool looks up MIME types (also called media types or content types) for file extensions, and the extensions for a MIME type. MIME types tell browsers and servers what kind of file something is, used in the Content-Type header, downloads and uploads.
How MIME Type Lookup works
How to use it
- Type a file extension (like png or pdf) to see its MIME type.
- Or type part of a MIME type (like image/ or application/json) to find matching extensions.
How it works
It searches a built-in table of common content types across images, video, audio, documents, archives, fonts and code. The result is the value you would put in a Content-Type header.
Common uses
- Find the MIME type for a file
- Set a Content-Type header
- Check the type for an upload
- Look up image or video MIME types
- Find extensions for a MIME type
- Configure a server response
- Validate file types
- Reference MIME types while coding
Frequently asked questions
What is the MIME type for a PNG?
image/png.
What is a MIME type?
A label like image/png that says what kind of file something is.
What is the MIME type for JSON?
application/json.
Where are MIME types used?
In the Content-Type header, uploads and downloads.
What is the type for a PDF?
application/pdf.
What if my extension is not listed?
Unknown types usually default to application/octet-stream.
Is it two-way?
Yes — search by extension or by MIME type.
Is it free?
Yes — completely free with no sign-up.