WCAG Accessibility Scanner

It runs axe-core, the open-source accessibility testing engine also used inside Chrome DevTools and most commercial WCAG scanners, against the live rendered page. It checks WCAG 2.0/2.1/2.2 success criteria (levels A, AA, and AAA) and reports every violation it finds.

No — this is an automated scan. Automated tools like axe-core catch roughly a third to half of WCAG issues (missing alt text, poor color contrast, missing form labels, and similar). A full audit for legal compliance (ADA, Section 508) also needs manual testing with a screen reader and keyboard-only navigation. Use this as a free first pass before a fuller manual or professional audit.

For security, the scanner only accepts publicly reachable URLs. Internal, private-network, and localhost addresses are blocked.

These are axe-core's impact ratings for how severely an issue affects users of assistive technology. Fix critical and serious issues first — they're the most likely to make content completely inaccessible to some users.