File signature inspector
File signature inspector — Suggest a format from the file header, not the extension. This is not a malware scan.. Processed on your device.
Files
First 32 bytes / magic bytes; format hints, not a security scan · Limit: 50 MB
Files are processed in this browser, without uploading.
Suggest a format from the file header, not the extension. This is not a malware scan.
Result —
Processed on your device · Free to use · No sign-up
How to use
- Load file (First 32 bytes / magic bytes; format hints, not a security scan)
- Options → Run tool
- Copy result
Input format & limitations
File signature inspector — Suggest a format from the file header, not the extension. This is not a malware scan.. Processed on your device.
Frequently asked questions
Do I need to upload data or sign up?
Local tools do not send input. IP and DNS lookups send the query and connection IP to the listed third parties only after a click.