Free Accessibility Lighthouse Audit
Run Google Lighthouse's full accessibility audit to measure WCAG compliance across your webpage — including contrast ratios, ARIA labels, form inputs, and keyboard navigation.
Free Accessibility Lighthouse Audit
Accessibility is not just a compliance requirement — it directly influences SEO. Google uses accessibility signals to assess content quality. Our free Lighthouse accessibility audit gives you a WCAG compliance score and itemizes every failing check.
Why Accessibility Affects Your Google Rankings
Google's search quality guidelines explicitly state that accessible content — properly labeled images, semantic HTML, readable fonts — is a signal of content quality. Screen readers and Googlebot's rendering engine both process pages similarly, parsing alt text, heading structure, and ARIA attributes. An accessibility score below 90 almost always correlates with structural HTML problems that also hurt your SEO. Fix accessibility, fix both simultaneously.
Our free audit checks contrast ratios (4.5:1 minimum for normal text per WCAG AA), image alt attributes, form label associations, ARIA role validity, heading order correctness, link discriminability, and more. The full Lighthouse accessibility audit runs 57 individual checks — more comprehensive than most paid accessibility tools. Pair this with our Free SEO Lighthouse Audit for a complete technical health picture.