Free browser tool

MIME type lookup

Look up common MIME types by extension or MIME value.

Input and settings

How to use it

Look up a common MIME type from a file extension, or find extensions by searching part of a MIME type. The tool searches a small built-in reference table locally in the browser.

Enter a file extension such as .png or jpg, or type part of a MIME type such as image/.
Select Lookup.
Review every matching extension → MIME type pair. Leave the field blank if you want to see the entire built-in table.

Search fields: Extension and MIME type
Matching: Case-insensitive substring match
Built-in entries: 22 common extension/MIME pairs
Output: Tab-separated extension and MIME type lines

Searching “image/” returns the built-in image formats

For example, image/ matches entries such as .png → image/png, .jpg → image/jpeg, .webp → image/webp, .avif → image/avif and .svg → image/svg+xml in the current table.

This is a convenience lookup, not an authoritative or exhaustive registry. For uncommon formats, vendor-specific types or current standards work, confirm against the relevant specification or official registry.

It is a compact built-in reference, not a complete MIME registry

The table contains common web and document types such as HTML, CSS, JavaScript, JSON, XML, PDF, PNG, JPEG, WebP, AVIF, SVG, ZIP, MP3, MP4, WebM and WOFF2. A missing result does not prove that a MIME type or extension is invalid.

Extension search accepts both dotted and undotted input

Searching .png or png can both reach the .png → image/png entry because the lookup checks extension text and also normalizes the exact-extension comparison.

MIME fragments can return several related formats

A query such as image/ matches every image MIME string in the built-in map. This is useful when you remember the media family but not the exact subtype.

MIME parameters are outside this lookup

The map stores base MIME values such as text/html and text/plain. Parameters such as charset=utf-8 are not modeled as separate records, so search for the base media type when possible.