MIME Type Lookup

About this tool

Web servers, uploads and APIs describe a file with a media type (also called MIME type or Content-Type), such as image/png or application/pdf. Enter a file name or extension (photo.JPG, .css, *.woff2) to see its type, or a type (application/json, text/html; charset=utf-8) to see the extensions registered for it, whether it is worth compressing and its default charset. A pattern such as image/* counts the types in that family. The data is the open mime-db registry, which merges the IANA registry with types used in practice; 2,522 types are included, 1,015 of them with file extensions. Some extensions map to more than one type; the first is the usual one. We compared the answers for 71 common extensions with Python's mimetypes module and they agree for 63; the rest are differences between registries, such as text/yaml here and application/yaml in Python, or audio/x-flac here and audio/flac there, and both are seen in the wild. The type a server should send for your files is a decision for you; use this to see the common choice. Everything runs in your browser; nothing is uploaded.

How to use it

1. Type one file name, extension or media type per line.
2. Read the types and extensions.
3. Use the compressibility hint when configuring your server.

Common problems

My extension is not found

Only extensions registered in mime-db are listed. Unknown formats are usually sent as application/octet-stream.

Two types are listed

Some extensions are used for more than one type. The first is the most common. Check what your tools and browsers expect.

The type differs from my operating system

Operating systems and libraries keep their own tables. Where they differ, both forms often work, but servers should send one consistently.