Google Chrome
Available nowInstall from the Chrome Web Store. Works on Chrome and Chromium-based browsers that support the Web Store.
- Open the Chrome Web Store listing
- Click Add to Chrome
- Pin the extension, then open Verify
C2PA Signer
Verify Content Credentials in Chrome
Free browser extension for local verification, page scanning and test-signing — without uploading files to a ProvSeal backend.
- Chrome Web Store
- Local-first
- No backend upload
Install C2PA Signer
One click from the Chrome Web Store. Firefox is submitted for review and will be announced when approved.
Mozilla Firefox
In reviewThe Firefox build is currently under Mozilla Add-ons review. Availability will be announced here when it is ready.
Follow status updatesVerify a local file
Drop a JPEG, PNG, PDF or video. The extension checks integrity and certificate trust on your device — the file stays local.
- Inspect Trusted vs Signed but untrusted
- Open a full C2PA report
- No ProvSeal backend upload for selected media
Scan the page you are reading
Run a user-triggered page scan to badge visible media with provenance status — useful for editors, reviewers and trainers.
- Analyze the active tab on demand
- Compare statuses across visible media
- Jump into the demo to practice before installing
Test-sign for demos and development
Compose a test signature locally, manage identities in the extension, and verify the result immediately — for demos, not public trust.
- Generate test certificates for local workflows
- Import your own signing material when needed
- Public trust still requires a recognized certificate chain
Four statuses. No ambiguity.
Provenance and integrity signals mapped to clear indicators — evidence, not a verdict that media is real or fake.
Recognized chain
Manifest integrity is valid and the certificate chain is recognized by the trust context.
Signed evidence
Manifest exists and is intact, but the certificate chain is unknown, self-signed or not publicly recognized.
Integrity failure
Manifest information does not match the current file or the C2PA evidence cannot be validated.
No C2PA evidence
No C2PA manifest was detected. This does not mean the content is fake.
Local-first by design
Selected files are processed locally by the extension. ProvSeal is built to inspect provenance and integrity without sending your media to a ProvSeal backend.
What it does not do
C2PA evidence is not fake detection. Test certificates are for demos and development only. Public trust requires a recognized certificate chain.
Install the extension and test the workflow locally
Add C2PA Signer to Chrome, open the demo, and verify a file in under a minute.