An open source screenshot extension for Chrome, Edge and Firefox

The core extension is licensed AGPL-3.0-or-later. The repository is public, the build is reproducible, and the privacy claims on this site are things you can confirm by reading the code rather than trusting a policy page.

What's open, and what isn't

Being precise about this matters more than claiming everything is open:

• Open (AGPL-3.0-or-later): the whole capture pipeline — full-page stitching, visible-area and selected-area capture, cropping, annotation, blur/blur, undo, and PNG and PDF export.
• Proprietary: the watermark module, which is the single paid feature. It is a separate component, not part of the AGPL core.

So every feature you can use without paying is a feature you can read the source of.

Why AGPL

AGPL keeps derivatives open. If someone ships a modified OpenCapture as a hosted service, they have to publish their changes too. For a tool whose whole point is that you can audit it, a weaker licence would undercut the guarantee.

Contributing and reporting problems

Bugs and feature requests go to Issues; open-ended questions to Discussions. Security reports should go through a private channel rather than a public issue.

Build it yourself

Reading the source is one thing; building it is stronger. If you build the bundle, nobody swapped it between the repository and the store listing. The Build from source section of the README covers it: Rust with the wasm32 target and Node 22, then npm run build for Chrome or npm run build:firefox for Firefox, and load the result as an unpacked extension.