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Preview of axe DevTools® - Web Accessibility Testing

axe DevTools® - Web Accessibility Testing by Deque Systems Inc.

Add accessibility auditing to the Firefox Developer Tools

4.5 (48 reviews)4.5 (48 reviews)
9,707 Users9,707 Users
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Automatically catch accessibility defects while you code. Screenshot of interface.axe - Powered by Deque.
About this extension
Accessibility checker for developers, testers, and designers in Firefox.

Find and fix more accessibility issues during website development with axe DevTools.

The free axe DevTools® browser extension is a fast, lightweight, yet powerful testing tool driven by the world’s most trusted accessibility testing engine, axe-core, developed by Deque.

Why use axe DevTools to build accessible websites?
-To deliver brilliant user experiences for everyone, including the 1 billion people globally living with a disability today.
-To avoid wasting time chasing fake issues. Only axe prevents false positive results.
-To improve accuracy, preventing tickets from resurfacing again and again.
-To reduce the risk and cost of accessibility lawsuits.

★ Automated testing
With the push of a button, axe DevTools analyzes your site, automatically surfacing the majority of common accessibility issues—almost triple the industry average. Drill down into each issue, inspect the source of the problem and leverage extensive free remediation guidance to fix it quickly and accurately.

★ No False Positives
Nobody has time to chase issues that aren’t actually issues. Axe DevTools reports only issues with absolute certainty. Other tools report irrelevant and inaccurate results, wasting your time, money, and productivity on rework.

★ The fastest and most effective path to accessible
Using axe DevTools to proactively find and fix accessibility issues significantly reduces the need for manual testing, giving you quick and easy wins without disrupting your development velocity.

Use of this extension is governed by this license agreement https://www.deque.com/terms-of-use/axe-ext/

This extension does not capture any information or usage analytics at all.
Rated 4.5 by 48 reviewers
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Permissions and dataLearn more

Required permissions:

  • Extend developer tools to access your data in open tabs
  • Access browser tabs
  • Access your data for all websites
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Version
4.111.0
Size
2.43 MB
Last updated
a month ago (Jul 1, 2025)
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Release notes for 4.111.0
bug fixes
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