Accessibility · WCAG 2.1 · European Accessibility Act
Is your site accessible?
Rock-solid static checks on the served HTML — the ones that can be verified automatically with no margin of error.
Diagnostic overlay
Drag the button to your bookmarks bar, then click it on any page: it highlights images without alt, unlabeled fields and missing language, directly on the site. It's diagnostic — it shows problems, it doesn't fix them (no widget patching the DOM).