What is the MIME type for JSON?

application/json. For JavaScript files the current standard type is text/javascript.

What MIME type should I use for an unknown binary file?

application/octet-stream is the generic type for arbitrary binary data; browsers usually download it rather than display it.

Is the MIME type the same as the Content-Type header?

The Content-Type header carries a MIME type, optionally followed by parameters such as charset, for example text/html; charset=utf-8.

MIME Types List - File Extension to Content-Type

Searchable reference for common file extensions and MIME types with one-click copying.

About MIME Types Cheat Sheet

Searchable list of MIME types and the file extensions they map to. Look up the Content-Type for an extension or full filename, or list every extension for a MIME type, and filter by top-level type such as image, video or font. Exact extension matches are shown first with a copy button.

Common uses

Set the correct Content-Type header when serving or uploading a file
Fill in an accept attribute or an upload allowlist
Find which extensions belong to a MIME type like application/vnd.ms-excel
Configure content types for a static file server or object storage bucket

FAQ

What is the MIME type for JSON?: application/json. For JavaScript files the current standard type is text/javascript.
What MIME type should I use for an unknown binary file?: application/octet-stream is the generic type for arbitrary binary data; browsers usually download it rather than display it.
Is the MIME type the same as the Content-Type header?: The Content-Type header carries a MIME type, optionally followed by parameters such as charset, for example text/html; charset=utf-8.