Document Signing

Sign a Document

Cryptographically sign any PDF with ECDSA secp256k1. Supports multi-signature maker-checker workflows — each signer adds their signature independently.

1
Key Setup
2
Upload PDF
3
Signed

Select Signing Key

Choose a key from your local wallet

Issuer Branding

This information will be cryptographically bound to the document.

Multi-Signature (Maker-Checker)

Automatic — just drop an already-signed PDF to co-sign it

How it works: Each signer uses their own private key. No key sharing required.

Step 1: Sign & download → Step 2: Send the signed PDF to the next signer → Step 3: They drop it here and add their signature → Repeat.

Batch Issuance Engine

Upload a .zip of thousands of PDFs to sign them asynchronously.