We can't read your contracts
Most signing services keep a readable copy of every agreement you send. Trutio holds ciphertext or nothing at all, so a breach of our servers exposes no contract text.
Contracts we can't read. Proof anyone can check.
Trutio encrypts agreements in your browser and seals every signature with timestamps you can verify without us.
SHA-256 fingerprint
computing…Computed in your browser. Change a single character and watch the fingerprint.
From upload to proof
Four things happen to every agreement. None of them require trusting us.
- EncryptYour browser encrypts the PDF before upload. The key travels only in the link you send, so we store ciphertext we cannot open.
- SignSigners open the real document, their browser confirms its fingerprint, and they sign with a verified email. No account needed.
- SealThe original, the signatures, and the final PDF each get a trusted timestamp and a Bitcoin anchor.
- VerifyAnyone can check a copy with free tools like openssl. The proofs keep working even if Trutio is gone.
Proof that outlives us
Download every proof file. Courts and auditors can check them with standard tools.
Signers see what they sign
Signing stays locked until the signer's browser confirms the exact sealed document.
Send your first agreement
Free for 3 documents a month. No card required.