C2PA Signer

Sign C2PA on JPEG/PNG. Create a test cert or import .p12/.pfx. Verify images, PDFs, videos and scan page media.

C2PA Signer lets you create and sign Content Credentials on your media directly in Chrome, without uploading files to a server. Start in seconds with a local test certificate, or import your professional identity when you are ready for production signing. ━━━ CREATE & SIGN ━━━ Test identity: Generate a local signing certificate to try Content Credentials on standard images. Ideal for learning and internal workflows. Import a certificate: Use an identity file issued by your certification authority. Your private key stays on your device. Guided signing flow: Pick a file, add optional title and author metadata, review what will be embedded, and download the signed media. Post-sign check: Verify the signed file immediately in one click. ━━━ VERIFY ━━━ Local support: Verify standard image, document, and video formats locally. Right-click checking: Select “Verify this image” directly from the context menu on any supported media. Clear status: Instantly see if the file is verified, signed, invalid, or missing credentials. Full report: Access the manifest, certificate chain, trust signals, and exportable JSON (sensitive fields removed). ━━━ SCAN WEB PAGES ━━━ Manual scan: Run a check on the current tab (default behavior). Optional automatic scanning: Only active if you explicitly enable it. Status badges: Visual indicators appear on supported media elements. Exclude domains: Easily disable scanning for sensitive websites anytime. ━━━ PRIVACY ━━━ All verification and signing runs locally on your device. No backend servers. No ads. Your identities and keys never leave your browser. ━━━ NOTE ━━━ C2PA Signer checks cryptographic proofs to ensure metadata integrity — it does not judge whether content is “real” or “fake.” Test certificates are for experimentation only; import a recognized certificate for public signatures.