Accessibility Testing Goes Open Source and Mainstream

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Introducing aXe: The Accessibility Engine

I am thrilled to make our award-winning accessibility rules aXe Logoengine available as open source so we as a community can build upon 15 years of industry-leading accessibility research and best practices.

Accessibility experts can now stop duplicating efforts and work from a common set of rules. Developers and testers can quickly get consistent, reliable, and meaningful results that are actionable. Automated accessibility testing results become easy to understand, extend, and integrate.

The Accessibility Engine, or aXe, is a compact JavaScript library that is open source and available on GitHub. This library makes integration into any development and testing tool simple and quick. Use aXe with any JavaScript framework and any modern browser. Enjoy zero false positive results, eliminating noise and frustration.

Deque’s mission is digital equality. If we are to achieve that mission together, we need to take a new approach. Our community goal is to create the most trusted set of accessibility rules anywhere. We invite cooperation rather than competition. Join us in making automated accessibility testing truly “accessible”!

Deque has been invited to contribute the aXe open source library to the W3C WAI Evaluation and Repair Tools Working Group, as work is under consideration there for a normative set of rules for evaluating WCAG 2.0 conformance.

We hope you will join us in our mission and help bring equality to the digital world.


Preety Kumar

Learn more about aXe at

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