MIME Type Lookup
Looks up the MIME type for a file extension and the extensions for a MIME type, across documents, images, audio, video, fonts, archives and code — with notes on the types that browsers treat specially.
Runs 100% in your browser — nothing you paste leaves your device.
Read the full guide to this tool
Notes
- Servers choose how browsers treat a file via the Content-Type header — a wrong type breaks CSS, modules and fonts even when the bytes are perfect.
- application/octet-stream means "unknown binary": browsers download it instead of displaying it.
- Runs 100% in your browser — nothing you paste leaves your device.
Explore the idea
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