Sign documents. Let anyone verify them.
Upload a PDF, place a QR seal, and apply a cryptographic PAdES signature with your own key. Anyone can scan the seal to publicly verify a document's authenticity and revocation status — no account needed.
Sign with confidence
Each signer holds their own encrypted key. Documents are sealed with a PAdES signature and a scannable QR.
Public verification
Scan the QR or open /verify?id=<id>. Works on any device, instantly, without logging in.
Full control & audit
Manage users, revoke documents with a reason, and review a complete audit trail of every action.