MIME Type Lookup
Look up a common MIME type from a file extension or find known extensions for a MIME type.
Look up common MIME types from filenames—or reverse them
Inspect a filename, extension or MIME type against the built-in reference without reading a file or sniffing its actual bytes.
MIME lookup
mode
5 B
input size
76 B
output size
Filename, extension or MIME type
5 charactersMIME reference
76 charactersExtension lookup is a reference, not content verification. Unknown extensions fall back to application/octet-stream.
About the MIME Type Lookup
MIME Type Lookup is a focused browser-based utility. Look up a common MIME type from a file extension or find known extensions for a MIME type.
The calculation runs locally in your browser, so the supplied value is not uploaded to ToolsOnDuty. The same capability is also available through the authenticated developer API.
Key features
- Fast local processing with explicit validation
- Copy-ready structured result
- No account, upload or paid data provider required
How to use
- 1Enter a filename, extension or MIME type.
- 2Choose any available conversion or formatting options.
- 3Run the tool and review the matching MIME reference.
Examples
a filename, extension or MIME typethe matching MIME referenceFrequently asked questions
- Is my input uploaded?
- No. This website tool runs in your browser. Only the optional public API version sends input to the authenticated API route.
- Can I use this in an application?
- Yes. The Developers documentation lists the authenticated endpoint, request parameters and response example.
- Should I verify the result?
- Yes. Deterministic tools are designed for repeatable results, but format-specific or heuristic output should still be checked for your use case.
Continue your workflow
Open a related tool to prepare your files or refine the finished result.