Google Lighthouse

An open-source automated tool developed by Google for auditing web pages across multiple quality dimensions including performance, accessibility, best practices, and SEO. Lighthouse's accessibility audit checks a subset of WCAG criteria automatically, generating a score from 0 to 100 and identifying specific issues like missing ARIA labels, low color contrast, and unlabeled buttons. While useful for catching common accessibility issues, Lighthouse only detects a fraction of potential barriers and cannot evaluate the actual user experience with assistive technologies. It is commonly used as a baseline accessibility check in research and development.