Validate TimestampPro
Validate the timestamp on a signed PDF. Pro plan required. Secure and fast.
How to Validate Timestamp
Upload your signed PDF
Timestamp is verified
View validation results
Frequently Asked Questions
1What is validated?
The timestamp's cryptographic signature, issuing authority, and whether the document has been modified since timestamping.
2What if validation fails?
A failed validation means the document was modified after timestamping, the timestamp is expired, or the issuing authority is not trusted.
3Can I validate timestamps from other tools?
Yes. The validator works with timestamps from any RFC 3161 compliant Time Stamping Authority, not just ZiaSign.
4Is timestamp validation legally accepted?
Yes. Cryptographic timestamp validation is accepted in courts and regulatory proceedings as proof of document existence and integrity.
Why Use ZiaSign's Validate Timestamp Tool?
ZiaSign's timestamp validator verifies the authenticity and integrity of a PDF's cryptographic timestamp. Confirm that the timestamp was issued by a trusted authority and that the document hasn't been modified since.
Also known as: validate pdf timestamp · verify pdf timestamp · check pdf timestamp · timestamp verification
How-to guide
Prefer the step-by-step version first?
Step-by-step instructions to validate the timestamp on a signed pdf with ZiaSign.
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