Prove a document is real and untouched.
Put a cryptographic seal on contracts, reports, filings, and records. Anyone can verify in seconds that a sealed document is authentic and unaltered. No account needed, and no need to take our word for it.
How it works
Seal it
One click in the dashboard or one API call.
Send it anywhere
The seal travels inside the file, not in a database you have to ask.
Anyone verifies
Drag and drop gives an instant authentic-or-altered verdict.
Seal and verify something right now
Paste your content
Sample article pre-filled. Edit it or paste your own.
No account required
This demo uses a shared signing key. Your own content uses a key tied to your organization.
Invisible to readers
Watermarks are zero-width Unicode characters. CMS systems, search engines, and human readers never see them.
C2PA 2.3 compliant
Encypher authored Section A.7 of the C2PA standard. This demo produces standard-compliant manifests.
Where this fits
Security and data handling
Your keys, your control
Seals are signed with keys tied to your organization. Bring-your-own-key (BYOK) is available for teams that require key custody.
Verification needs no account and no trust in us
The seal is a C2PA manifest inside the file. Any standards-based verifier can check it independently.
Audit trail on every operation
Every seal and verification is logged and exportable for compliance reviews.
For engineers
curl -X POST https://api.encypher.com/api/v1/sign/media \
-H "Authorization: Bearer $ENCYPHER_API_KEY" \
-F "file=@contract.pdf"- C2PA manifests signed with an X.509 certificate chain
- PDF, DOCX, images, audio, and video
- BYOK available for enterprise key management
- Audit logs on every operation