Possibly https://github.com/freedomofpress/webcat https://github.com/freedomofpress/webcat? (I also made one, a long time ago: https://github.com/twiss/hcs-chec

Possibly https://github.com/freedomofpress/webcat https://github.com/freedomofpress/webcat? (I also made one, a long time ago: https://github.com/twiss/hcs-checker-firefox https://github.com/twiss/hcs-checker-firefox.) There is also an effort to build this into browsers directly, which we (Proton) are involved with: https://github.com/twiss/source-code-transparency https://github.com/twiss/source-code-transparency (old initial proposal) https://github.com/beurdouche/explainers/blob/main/waict-explainer.md https://github.com/beurdouche/explainers/blob/main/waict-exp... (more recent proposal) https://github.com/beurdouche/w3c-waict/blob/main/waict.bs https://github.com/beurdouche/w3c-waict/blob/main/waict.bs (very early draft specification)