File Signature Inspector
Detect file magic bytes.
Runs locally in your browser
Your inputs are processed locally in your browser and are not uploaded or stored by us.
A free local utility to inspect file magic bytes.
How to Use
- Select a file locally using the file picker.
- Click the Process button to read the file header bytes.
- View the detected file format signature.
Privacy and Processing
All processing runs entirely in your browser. The tool reads only the first few bytes of the file to detect standard signatures (like PNG or PDF). This is not a malware or safety verification scan. ZIP signatures may apply to DOCX, EPUB, or APK containers without deep inspection.