Certyneo — PDF Sign & Verify

Merge, split, compress, sign and verify PDFs with Certyneo. Free PDF tools that run on your device.

Certyneo puts electronic signature one click away, without leaving your browser. VERIFY A SIGNED PDF — FREE, NO ACCOUNT • Right-click a PDF link, or open the extension on a PDF tab, and choose "Verify with Certyneo". • The file is analyzed inside your browser: integrity, signature, certificate and timestamp. • Only its SHA-256 fingerprint is sent, to recognize documents signed with Certyneo. • Clear result — "Valid document" or the exact reason for doubt — and a downloadable report. SIGN A PDF • Upload a PDF or use the one in your tab; it opens in Certyneo so you can place your signature. SEND FOR SIGNATURE • Add signers, choose sequential or parallel signing, then place the fields in Certyneo and send. ANALYZE A CONTRACT • Get a summary, the key clauses and points to watch before signing. A reading aid, not legal advice. PROTECT IN YOUR VAULT • Save a PDF to your Certyneo digital vault: timestamped, sealed and kept unalterable. PRIVACY BY DESIGN • You sign in on certyneo.com (OAuth 2.0 with PKCE): the extension never sees your password. • No reading of the pages you visit, no browsing history, no ads. • Anonymous usage statistics only. The extension inspects signatures technically; it does not replace a qualified validation service under eIDAS for signatures issued by other providers.