axe-core iconaxe-core

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Open-source accessibility testing engine for websites: fast, secure, zero false positives. Seamlessly integrates with existing test environments.

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5.9K GitHub Stars
Zero False Positives
2015 Founded

Overview

axe-core is Deque's open-source accessibility testing engine for websites and HTML-based user interfaces. Designed for speed, security, and accuracy, it returns zero false positives (bugs notwithstanding) and integrates seamlessly with any existing test environment. The library works across all modern browsers and frameworks, enabling automated accessibility testing alongside regular functional testing without requiring specialized knowledge of WCAG guidelines.

The Verdict

Who Should Use axe-core?

Best For

  • Development teams integrating accessibility testing into CI/CD pipelines
  • Organizations requiring WCAG 2.0/2.1 compliance
  • Projects needing reliable, false-positive-free accessibility checks

Not Ideal For

  • Teams needing 100% automated coverage (manual testing still required)
  • Projects without existing test infrastructure to integrate with

What's Great

  • Zero false positives architecture
  • Integrates with Jest, Cypress, Selenium, Playwright, etc.
  • Fast execution (runs in milliseconds)
  • Comprehensive WCAG 2.0/2.1 rule coverage
  • Framework-agnostic (React, Angular, Vue, vanilla JS)
GitHub Repository

Watch Out For

  • Only catches ~57% of WCAG issues (automation limits)
  • Requires manual testing for complete coverage
  • Learning curve for interpreting results without a11y experience
  • Some edge cases may require custom rule configuration
Community Issues

Pricing

Open Source
$0
Fully free under MPL 2.0 license. Deque also offers commercial products with additional features.
View all features & details

Key Features

  • 90+ automated WCAG 2.0/2.1 rules
  • Zero false positive guarantee
  • Integrations: Selenium, Cypress, Playwright, Jest, WebdriverIO
  • Browser extensions (Chrome, Firefox, Edge)
  • CI/CD pipeline support
  • Detailed issue reporting with remediation guidance

Platforms

  • All modern browsers (Chrome, Firefox, Safari, Edge)
  • Node.js for automated testing
  • React, Angular, Vue, vanilla JavaScript
  • Desktop and mobile web

How It Compares

Feature axe-core WAVE pa11y
False Positives Zero Occasional Occasional
WCAG Coverage 90+ rules 100+ indicators 80+ rules
Test Integration Excellent Browser only Good
Speed Very fast Fast Moderate
Pricing Free/OSS Free + Paid Free/OSS
Best For CI/CD pipelines Manual audits Automated testing

User Reviews

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