Individual
€0 no expiry
For sealing documents occasionally.
- 3 sealed documents
- Full SHA-256 fingerprint
- Integrity certificate
- Public verification link
- Verification always unlimited
Make your PDFs tamper-proof.
Every sealed document is unique and unalterable. Anyone can verify it.
Method
An altered document leaves no trace. A sealed one does.
The complete procedure takes three steps and requires no technical knowledge.
- 01
Document upload
PDF, Word, images or text. The file is processed in the browser itself and is never sent to any server.
- 02
Sealing
A unique fingerprint of the document is generated. Any later modification, however small, invalidates it.
- 03
Verification
The recipient checks authenticity from a link, with no sign-up or installation.
Pricing
Choose your protection.
Three plans with the same guarantee: any recipient can check the sealed document, at any time and at no cost.
Business · Professional
€1.99 / month
For ongoing document sealing.
- Unlimited sealing
- Seal history within the account
- Email support
- REST API access key
- API usage panel
AI agent security
Custom
TRAMPTO sealing, applied to AI agents: every action they carry out is recorded and can be audited afterwards.
- Sealed record of every action
- Alerts on risky actions
- Verifiable evidence for audits
- Claude, OpenAI, Gemini and more
Guarantees
Security that can be verified.
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The document is never stored, not even temporarily.
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The fingerprint is irreversible: it does not allow the content of the file to be reconstructed or inferred.
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Sealing operates offline; registration completes once the connection is restored.