File Type Detector
Detect a file's true type by reading its binary signature, not just its file extension.
Only a curated set of common file signatures is recognized — uncommon or proprietary formats may show as unrecognized.
Upload a file
Drag & drop files here, or
Detects the real file type from its binary signature
How It Works
- 1Upload a file.
- 2Its first bytes are checked against known file signatures.
- 3See the detected type instantly.
Features
- Detects common image, archive, audio and document formats
- Flags mismatched extensions
Privacy
This tool runs entirely in your browser — your files are never uploaded to a server.