Green Checkmark C2PA Verifier

ExtensionTools5 users

Overview

Accesses photos and videos only to verify Green Checkmark digital signatures.

This tool verifies the C2PA signature embedded in photos and videos created by the GreenCheckmark app. It shows users an "Invalid Signature" warning if the photo may have been modified since it was recording. A "Valid Signature" will be shown if the certificate chain is valid. https://green-checkmark.org

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Details

Version
1.3
Updated
February 1, 2026
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Offered by
Evergreen Labs
Size
6.82MiB
Languages
English
Developer
Email
billy@evergreen-labs.org
Non-trader
This developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.

Privacy

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The developer has disclosed that it will not collect or use your data. To learn more, see the developer’s privacy policy.

This developer declares that your data is

Not being sold to third parties, outside of the approved use cases
Not being used or transferred for purposes that are unrelated to the item's core functionality
Not being used or transferred to determine creditworthiness or for lending purposes

Support

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