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Free online MIME types lookup tool for web developers. Find MIME types by file extension or discover file extensions for any MIME type.
Looks up MIME types by file extension and vice versa using a built-in database of 100+ common MIME types. Enter a file extension like .json to get its MIME type, or enter a MIME type like application/json to find all matching extensions.
Developers constantly need to know MIME types for HTTP headers, content-type configurations, and file handling. Having a quick lookup tool eliminates the need to search external references.
Web developers configuring servers, API developers setting content types, DevOps engineers writing deployment configs, and anyone working with file uploads or HTTP headers.
Select the lookup direction: Extension to MIME or MIME to Extension
Type a file extension (e.g. pdf) or MIME type (e.g. application/json) in the input field
Results appear instantly as you type
Click Copy to copy the results to your clipboard
.json → application/jsonapplication/javascript → .js.jpg → image/jpegvideo/mp4 → .mp4, .mp4v, .mpg4Over 100 common types covering web, document, media, and font formats.
Yes, charset suffixes are stripped before matching.
Only if they're in the built-in database; no external API is used.
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