Add Timestamp
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What is Add Timestamp?
Add Timestamp updates the PDF's internal creation and modification dates to the current date and time. It uses pdf-lib's setCreationDate() and setModificationDate() methods to modify the document's metadata timestamps.
How to Use Add Timestamp
- Upload your PDF file.
- Click Add Timestamp. The tool sets both the creation and modification dates to the current moment.
- Download the result as
timestamped.pdf.
Why Use Add Timestamp?
Timestamping establishes when a document was last modified, which is useful for version tracking, compliance workflows, and establishing document provenance. This is a metadata-level timestamp, not a cryptographic timestamp — for cryptographic proof, use the dedicated Timestamp PDF tool instead.
Privacy & Security
Your files never leave your browser. The timestamp is applied entirely on your device. Nothing is uploaded to Racira's servers, no copies are stored in the cloud, and no file data is transmitted at any point.
Frequently Asked Questions
What's the difference between this and Timestamp PDF?
Add Timestamp simply updates the PDF's internal date metadata fields. Timestamp PDF uses a cryptographic signing authority to create a verifiable, tamper-evident timestamp that can be validated independently. Use Add Timestamp for simple version tracking; use Timestamp PDF when you need cryptographic proof of when a document existed.