Axe Core
Axe Core is an open-source accessibility testing engine for web applications, developed by Deque Systems. It provides automated testing capabilities to identify accessibility issues in HTML-based user interfaces, helping ensure compliance with standards like WCAG (Web Content Accessibility Guidelines). The tool integrates with various testing frameworks and browsers to detect common accessibility barriers such as missing alt text, improper ARIA attributes, and keyboard navigation problems.
Developers should learn and use Axe Core to build inclusive web applications that are accessible to users with disabilities, which is often a legal requirement and improves user experience for all. It is particularly valuable in continuous integration pipelines, automated testing suites, and during development to catch accessibility issues early, reducing remediation costs and ensuring compliance with accessibility standards like WCAG 2.1 or Section 508.