axe DevTools

A widely used suite of automated accessibility testing tools developed by Deque Systems, available as browser extensions, command-line tools, and integrable libraries. The axe-core engine is an open-source JavaScript library that tests web content against WCAG success criteria and other accessibility rules, identifying violations such as missing alt text, insufficient color contrast, missing form labels, and improper heading structure. axe DevTools is available as Chrome and Firefox extensions for manual testing, and as axe-core for integration into CI/CD pipelines, linters, and development workflows. While powerful for detecting many common violations, automated tools like axe can only catch approximately half of WCAG issues — manual testing with assistive technologies remains necessary for comprehensive evaluation.