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Verify SignaturesFree Account

Verify digital signatures in a PDF. Free account required. Secure and fast.

Secure processing
Files deleted after 1 hour

How to Verify Signatures

1

Upload the signed PDF

2

Signatures are verified automatically

3

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.

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.

Verify certificate validity and trust chain
Check document integrity after signing
Validate timestamps
Detect any post-signing modifications
Free account required

Also known as: verify pdf signature · check pdf digital signature · validate pdf certificate · pdf signature checker

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