Where does the data come from?

Static data based on MDN's "Common MIME types" list, the IANA Media Types registry, and the relevant specs (RFCs, etc.), bundled into the tool. No external API — everything runs in your browser.

What is a MIME type (Content-Type)?

An identifier for the kind of a file or data, in the form `type/subtype` (e.g. image/png, application/json). It's used in the Content-Type header a web server returns and in form/API requests to declare the data format; browsers use it to decide how to handle a file.

Can one extension have several MIME types?

Yes. Some extensions historically use multiple spellings (e.g. .xml is application/xml and text/xml; .ico is image/vnd.microsoft.icon and image/x-icon). This tool lists the single most recommended value as the canonical one.

Can I look up both directions (ext→MIME and MIME→ext)?

Yes. Search matches both the extension and the MIME type, so "webp" finds image/webp, and "application/vnd.openxml" finds docx / xlsx / pptx together.

Is .js text/javascript or application/javascript?

The current HTML spec recommends text/javascript (application/javascript is considered obsolete). This tool lists text/javascript.

How does the search work?

Partial match against the extension, MIME type, and category (image / audio, etc.), case-insensitive. A leading dot and surrounding whitespace are ignored. To filter by a localized category name, use the Category selector.

Back to Developer

MIME Type / Extension Lookup

Look up a file extension's MIME type (Content-Type) or reverse-search which extensions map to a type. Search .webp or .pdf, or go from application/json back to extensions. Filter by category (image / audio / video / text / application / font / 3D). Pure static data — runs entirely in your browser.

developerextract

How to use

Type an extension (e.g. webp, .pdf) or a MIME type (e.g. application/json, image) to filter the matching pairs. A leading dot (.webp) is optional. Use the Category selector to narrow to image / audio / video / text / application / font / 3D model. Static data based on MDN and IANA — runs entirely in your browser.

FAQ

Where does the data come from?: Static data based on MDN's "Common MIME types" list, the IANA Media Types registry, and the relevant specs (RFCs, etc.), bundled into the tool. No external API — everything runs in your browser.
What is a MIME type (Content-Type)?: An identifier for the kind of a file or data, in the form `type/subtype` (e.g. image/png, application/json). It's used in the Content-Type header a web server returns and in form/API requests to declare the data format; browsers use it to decide how to handle a file.
Can one extension have several MIME types?: Yes. Some extensions historically use multiple spellings (e.g. .xml is application/xml and text/xml; .ico is image/vnd.microsoft.icon and image/x-icon). This tool lists the single most recommended value as the canonical one.
Can I look up both directions (ext→MIME and MIME→ext)?: Yes. Search matches both the extension and the MIME type, so "webp" finds image/webp, and "application/vnd.openxml" finds docx / xlsx / pptx together.
Is .js text/javascript or application/javascript?: The current HTML spec recommends text/javascript (application/javascript is considered obsolete). This tool lists text/javascript.
How does the search work?: Partial match against the extension, MIME type, and category (image / audio, etc.), case-insensitive. A leading dot and surrounding whitespace are ignored. To filter by a localized category name, use the Category selector.

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