A LITTLE HELP FOR YOUR NEXT TASK
File Type & Signature Inspector
Compare common file signatures with the filename extension.
Private by design
Your inputs stay on your device and are not sent to our servers. Optional usage analytics does not receive your files or tool inputs.
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How to use File Type & Signature Inspector
- Choose a local file.
- Inspect its leading bytes and recognized format markers.
- Review extension mismatches and export the metadata.
What are the limits of File Type & Signature Inspector?
Reads at most the first 8 KB. Recognizes selected signatures, not every format or full-file validity. Not antivirus, a polyglot detector or a safety verdict. This tool processes inputs in browser memory and makes no upload or lookup request. Clear inputs or close the tab when finished. Exports and clipboard actions are explicit.