MIME Type Lookup Online
Free online MIME detector that maps filenames and hints to Content-Type values for HTTP responses.
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Free online MIME detector that maps filenames and hints to Content-Type values for HTTP responses.
How it works
This tool maps common extensions and signatures to MIME types like image/png or application/json. It helps set correct Content-Type headers.
Example
Input: file.json Output: application/json
FAQ
Why is Content-Type important?
It tells browsers and clients how to interpret the response, which affects rendering, downloads, and security behavior.
Can extensions be wrong?
Yes. The most reliable detection uses content signatures (magic bytes) when available.
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