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Fingerprint a document

Computes a file hash for verification and chain-of-custody records.

Document Hash computes a SHA-256 fingerprint for the file so you can prove whether a copy has changed.

Network

Works offline. Once this page has loaded, the tool never contacts the network again.

Your document

Nothing leaves your device — the document is processed locally in this browser.

Things people ask for this
compute SHA-256generate a checksumfingerprint this PDF

Typed into the workspace command bar, any of these opens this tool. They are the assistant's own routing examples, not a rewrite of them.

Also called: hash · checksum · sha-256 · file fingerprint · chain of custody · document hash