MIME Type Lookup
Look up the MIME (content) type for any file extension or filename, or find the extensions for a content type — live. Search across hundreds of types, browse by category, see whether a type is compressible, and copy values or pipe the matches as JSON. Runs entirely in your browser.
About this ToolHow it works, benefits & use casesTap to collapse
Look up the MIME (content) type for a file extension or filename, or go the other way and find which extensions belong to a content type — the search runs live across hundreds of entries. Type "png" and you get image/png; type a full filename like archive.tar.gz and it resolves the right type; type "image/" or "application/json" and it lists matching types and their extensions. When an exact lookup finds nothing the tool automatically broadens to a free-text search so you still get useful results. Each result card shows the MIME type, a short description, its associated extensions, its category, and whether the type is compressible (benefits from gzip/brotli) or already binary. You can also browse the whole catalogue by category, copy any value with a click, and export the matches as JSON. Everything runs in your browser.
How to Use
- 1Type an extension (png), a filename (archive.tar.gz), or a MIME type (application/json) into the search box.
- 2Read the result cards — MIME type, description, associated extensions, category, and a compressible/binary badge.
- 3If an exact lookup finds nothing, the tool falls back to a free-text search automatically.
- 4Click any MIME type or its copy button to copy the value.
- 5Click a category chip under "Browse by category" to see every type in that group.
- 6Copy, download, or pipe the matches as JSON to another tool.
Key Benefits
- Two-way lookup: extension or filename to MIME type, and MIME type to extensions
- Automatic fallback to free-text search when an exact lookup misses
- Each result shows description, extensions, category, and compressibility
- Compressible vs binary badge to inform gzip/brotli decisions
- Browse the full catalogue grouped by category
- One-click copy of any MIME value and JSON export of all matches
- Hundreds of types covered, all resolved in your browser
Common Use Cases
- Setting the correct Content-Type header when serving a file from a backend
- Configuring an upload validator to accept specific MIME types
- Finding which file extensions map to a given content type for a download handler
- Deciding whether a response type benefits from gzip/brotli compression
- Looking up the type for an unusual or compound extension like .tar.gz
Browse by category
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Yes — the single search box accepts all three. Enter an extension like "png", a full filename like "report.pdf", or a content type like "application/json" or "image/", and the tool resolves the matching MIME types and their associated extensions.
It indicates whether a type typically benefits from gzip or brotli compression. Text-based types like JSON, HTML, and CSS are marked compressible, while already-compressed formats such as JPEG, PNG, or ZIP are marked binary, where extra compression usually adds little.