Axe Core

Axe is a testing framework designed for accessibility evaluation of websites and other HTML-based user interfaces. It offers speed, security, and a lightweight design, and it was developed to easily integrate into any existing testing environment, allowing you to automate accessibility checks alongside your standard functional tests. Axe-core includes various types of rules that comply with WCAG 2.0 and 2.1 at levels A and AA, in addition to several best practices that assist in identifying common accessibility standards, such as ensuring every page contains an h1 heading, and in avoiding pitfalls in ARIA, such as attributes that may be overlooked. With axe-core, you can automatically detect approximately 57% of WCAG issues. Furthermore, axe-core will mark elements as ‘incomplete’ when it cannot determine their status, indicating that a manual assessment is required.