Add TimestampPro
Add a trusted timestamp to a PDF document. Pro plan required. Secure and fast.
Secure processing
Files deleted after 1 hour
How to Add Timestamp
1
Upload your PDF
2
Timestamp is applied automatically
3
Download the timestamped PDF
Frequently Asked Questions
1What does a timestamp prove?
A cryptographic timestamp proves the document existed at a specific date and time, and hasn't been modified since.
Why Use ZiaSign's Add Timestamp Tool?
ZiaSign's trusted timestamp tool adds a cryptographic timestamp to your PDF, proving the document existed at a specific point in time. Essential for intellectual property, regulatory filings, and legal evidence.
Cryptographic timestamp with trusted authority
Proves document existence at a point in time
Tamper-evident — any modification invalidates
Essential for legal and regulatory use
Also known as: pdf timestamp · trusted timestamp pdf · document timestamp · cryptographic timestamp
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