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File signature inspector

Inspect the first 4096 bytes of a local file or HEX data to identify candidate file formats.

Text, files and images are processed in your browser and are not uploaded.

Input

Input format

Only the first 4096 bytes are read. Shared and container signatures can match several formats. This is not a malware or integrity check.

Result

Run the tool to see the result.

How to use

Choose a non-empty local file or enter up to 4096 bytes in HEX. Only the first 4096 file bytes are read. Matches are candidate formats, not proof of file validity or safety. Shared signatures and containers can match multiple extensions; ZIP is not classified as a specific Office format. Export includes the inspected header bytes and candidate signatures.

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