Sign a Document
Sign with your DID wallet or browser key — your file never leaves your device.
How it works
1
Connect
DID wallet auto-detected, or generate a browser key.
2
Drop a PDF
File stays on your device. SHA-256 hash computed locally.
3
Sign
W3C Verifiable Credential created and stored in your wallet.
DID Wallet Recommended
Connect Attestto ID or any CHAPI-compatible wallet.
Browser Key Instant
Self-issued did:key in your browser. Works immediately.
Firma Digital Coming soon
Costa Rica Firma Digital smart card. PKI-backed.
Verify after signing
Verify at verify.attestto.com