MIME Type Checker
Check a likely MIME type from a filename or inspect browser-reported metadata from an uploaded file.
MIME Type Checker tool
This page estimates MIME type from extension and browser metadata. It does not perform deep binary sniffing.
| Metric | Value |
|---|
Privacy: checks run locally in your browser. Files are not uploaded or transmitted.
This page looks at the filename extension and compares it to a built-in MIME mapping.
If you upload a file, it also shows browser-reported metadata such as File.type and size.
Examples
- document.pdf → application/pdf
- photo.jpg → image/jpeg
- data.json → application/json
FAQ
- What does this MIME type checker do?
It estimates a file MIME type from a filename extension and can also read browser-reported metadata from an uploaded file.
- Does it inspect raw file bytes?
No. This page does not do full binary signature analysis. It uses filename extension mapping and browser file metadata when available.
- Why can MIME type results differ across tools?
Different tools may rely on different sources such as file extensions, browser metadata, OS file associations, or binary sniffing.
- Is my file uploaded to a server?
No. File inspection runs locally in your browser and no file is uploaded or transmitted.