Verify a signed PDF

Check any signed PDF, from SndSign or any other provider: whether it changed after signing, who signed it, and whether SndSign sealed it. Free, no account needed.

Drop a signed PDF hereor choose a fileFrom any provider. For a SndSign document you can add its Certificate of Completion, or drop the Evidence Package (ZIP).PDF or ZIP, up to 50 MB each

Checked in your browser. The file is not uploaded or kept.

What we check

Whether it changedIf anything in the file changed after each signature or seal, or was only added later.

Who signedThe name on each certificate, a person or an organisation, and who issued it, in which country.

Sealed by SndSignWhether SndSign's own seal is on the file, recognised by its exact certificate.

WhenThe signing time, and which timestamp service confirms it, if any.

Signature levels in the EU

Simple: A clicked, typed or drawn signature, with evidence of who signed. SndSign signatures are simple.
Advanced: Uniquely linked to the signer with a certificate. When SndSign opens, it seals every finished document with an advanced electronic seal based on a qualified certificate.
Qualified: Advanced, with a qualified certificate and device. Same legal effect as a handwritten signature in the EU.

We don't check whether a certificate is on an EU trusted list, at which level, or whether it was revoked. The EU validator (DSS) does, and gives an official report.

How SndSign seals and keeps evidence

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Verify a signed PDF

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