Developer utilities
MIME type mapper.
Look up a MIME type from a file extension, or find the common extensions associated with a media type. Everything runs locally in this page.
Look up a value
Result
Enter an extension or media type.
Source and limitations
Media type names are based on the IANA Media Types Registry, updated 2026-09-24. Extension associations are a compact, curated set of practical hints; IANA does not assign file extensions.
Use the result as a header or configuration starting point, not as proof of a file’s contents. The lookup does not inspect files or contact a server.