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Certify a PDF

Flattens the signed document and issues a certificate recording its SHA-256 fingerprint.

Sign & certify flattens the document you signed and issues a certificate recording its SHA-256 fingerprint, so anyone can check later whether the file changed. It does not send the document anywhere, does not verify who signed, does not establish a trusted time, and is not a cryptographic digital signature.

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
certify what I signedrecord of this signatureprove this file hasn't changed since signing

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: sign and certify · signing certificate · certificate of signing · signing record · send for signature · e-sign · esign