Horodatage PDF
Injectez un horodatage sécurisé RFC 3161 dans vos documents PDF pour prouver leur date de création.
Télécharger le PDF pour l'horodatage TSA
À propos de cet outil
Timestamp PDF adds RFC 3161 compliant trusted timestamps to your PDF documents using external Time Stamping Authorities (TSA). It provides legally-binding mathematical proof that a document existed in a specific, unaltered state at a precise instant in time.
Select from global trusted TSA servers such as DigiCert, Sectigo, SSL.com, FreeTSA, or MeSign. No personal signing certificates are required to secure your documents against future tampering.
Supports fully secure local hashing before handshake, guaranteeing absolute document contents remain 100% confidential.
Comment utiliser
Upload PDF Document
Select the target PDF file you want to timestamp.
Select TSA Server
Choose a trusted global Time Stamping Authority from the list.
Apply and Timestamp
Click Timestamp to fetch secure response from TSA and embed the token.
Cas d'utilisation
Intellectual Property
Establish clear priority proof of patents, drafts, and ideas before public release.
Financial Auditing
Provide certified tamper-proof logging of ledger archives and balance reports.
Legal Contracts
Lock legal agreements with a trusted time proof to avoid backdating arguments.
Questions fréquemment posées
What is a trusted timestamp (RFC 3161)?
An RFC 3161 timestamp is a cryptographically signed token issued by a recognized third-party authority (TSA) that links a document hash to a specific, verified clock source.
Do I need a digital certificate?
No, the cryptographic signature is provided directly by the trusted TSA server, making the process effortless for document owners.
Does the TSA see my document contents?
Never. The tool only sends a secure SHA-256 hash of your document to the TSA server, keeping your actual document completely private.