Pa11y
Open-source tool that automatically checks web pages for accessibility issues
Pa11y is a suite of free, open‑source tools for automated accessibility testing. It offers a command‑line interface for one‑off checks, a CI‑friendly runner, a web dashboard for daily monitoring with graphs, and a JSON‑based webservice for custom integrations. Designed for developers and non‑developers alike, Pa11y helps identify, track, and fix WCAG violations to make websites more inclusive.