Verify SignaturesFree Account
Verify digital signatures in a PDF. Free account required. Secure and fast.
How to Verify Signatures
Upload the signed PDF
Signatures are verified automatically
View verification results
Frequently Asked Questions
1What does signature verification check?
Certificate validity, signing authority, document integrity (whether the PDF was modified after signing), and timestamp verification.
2Can I verify self-signed certificates?
Yes. Self-signed certificates are verified but flagged as not issued by a trusted Certificate Authority.
3What if the document was modified after signing?
The tool clearly reports whether content was altered after the signature was applied — indicating the signature may be invalid.
4Can I verify multiple signatures in one document?
Yes. All digital signatures in the PDF are verified individually, each with its own status report.
Why Use ZiaSign's Verify Signatures Tool?
ZiaSign's signature verification tool checks the validity of digital signatures in your PDF documents. It validates the signing certificate, checks document integrity, and verifies timestamps. See at a glance whether a document has been tampered with after signing.
Also known as: verify pdf signature · check pdf digital signature · validate pdf certificate · pdf signature checker
How-to guide
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Step-by-step instructions to verify digital signatures in a pdf with ZiaSign.
Popular Ways to Use Verify Signatures
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