Download and extract
Download the ZIP above and extract it to a folder you keep locally.
CHROME MV3 / EXPLICIT ACTIONS / LOCAL-FIRST
Open evidence tools at the point of review.
Use the extension when a public page or image raises a provenance question. It opens the appropriate H/M tool, but it never makes a verdict, starts a scan, or uploads media on its own.
No account. No host permissions. English, Spanish and Chinese interface based on Chrome’s language.
TWO DELIBERATE FLOWS
The extension only prepares a review.
- 01Open local verifierOpen the C2PA workspace and choose a file already on your device.
- 02Right-click an imageChoose a save location for the image, then select that local copy in the verifier.
- 03Review a public pageThe visible URL is pre-filled in the page tool; the tool waits for you to start any scan.
UNPACKED INSTALL / CHROME
Install the local package.
Open extension settings
Open chrome://extensions and turn on Developer mode.
Load the folder
Select Load unpacked, then choose the extracted hm-local-evidence-launcher folder.
Use only when needed
Pin the extension. Its popup and right-click commands appear only when you choose to use them.
PERMISSION BOUNDARY
Small by design.
The package declares only activeTab, contextMenus, and downloads. It has no host permissions and does not run a content script on websites.
- Images
- The browser asks where to save the image. You choose whether to inspect the downloaded copy.
- Public pages
- The page URL stays in the URL fragment while opening the H/M review tool, so it is not sent as a page query parameter.
- Verdicts
- Neither the extension nor the H/M tools claim to determine whether media is true, false, or AI-made.