Timestamp PDF
Prove that a PDF existed, exactly as it is, at a given moment. An independent time server signs a fingerprint of the file, and the result is stored in the PDF as a document timestamp that PDF readers can check.
Timestamp PDF
Add · Choose server · Timestamp
How to timestamp a PDF
Add your PDF
Drop the file onto the tool or click Choose files.
Choose a time server
DigiCert, Sectigo, GlobalSign or FreeTSA.
Download
Press Add timestamp and download the timestamped PDF.
Why use it
What this free tool does
Trusted time
From an independent RFC 3161 time server.
Only a fingerprint
The time server sees a hash, never your document.
Checkable
Validate it here or in Adobe Reader.
Works with signatures
Add after signing to protect the signature in time.
Free servers
Public, free timestamp services.
Private
Your PDF stays on your device.
Why timestamp a document?
A trusted timestamp proves that a document existed in its current form at a certain time: useful for contracts, inventions, creative work, evidence and long-term archives.
The time server only receives a hash (a short fingerprint) of the PDF. Any change to the file afterwards makes the timestamp show as broken.
Tip: Signing too? Sign first, then timestamp, so the timestamp also covers your signature.
Your files stay on your device
Most online PDF sites upload your documents to their servers. Aleynray Ai does the work inside your browser instead, on your own computer or phone.
Nothing is sent anywhere, so contracts, bank statements, IDs and medical forms stay private, and there is no waiting for uploads.
- Free, with no sign-up or limits
- No watermark
- Files never leave your device
- Works on desktop and mobile
Frequently asked questions
Is my file sent anywhere?
No, only a fingerprint of it is sent to the time server, through this website.
Which time server should I use?
Any of them; DigiCert and Sectigo are widely trusted.
Can I check it later?
Yes, with Validate PDF Signature or Adobe Reader.
Is it free?
Yes. There is no sign-up, no limit on files and no watermark.
Are my files uploaded?
No. The tool runs inside your web browser and works on the file on your own device. Nothing is sent to a server, so private documents stay private.