7 Best Free Website Accessibility Checkers in 2026

Why You Need an Accessibility Checker

With the European Accessibility Act now in full force, every business with a digital presence in the EU needs to ensure their website meets WCAG 2.1 AA standards. But how do you know if your website is compliant? The answer starts with an accessibility checker — a tool that automatically scans your website and identifies accessibility barriers.

While no automated tool can catch every accessibility issue (manual testing is still essential for about 30-40% of WCAG criteria), automated checkers are the fastest and most efficient way to identify the majority of common problems. In this guide, we compare the seven best free accessibility checkers available in 2026.

1. EAAPass

Best for: EU businesses needing comprehensive EAA compliance checks

EAAPass is purpose-built for European Accessibility Act compliance. Unlike general-purpose tools, it specifically maps its checks to the requirements of the EAA and the harmonised standard EN 301 549, making it the ideal choice for EU businesses.

Key Features

• Full WCAG 2.1 AA automated audit
• EAA-specific compliance reporting
• Multi-page website scanning
• Detailed remediation guidance for each issue
• Exportable compliance reports
• Multi-language support (EN, PT, ES, FR, DE, IT)

Pros

• Specifically designed for EAA compliance
• Clear, actionable recommendations
• Modern, fast scanning engine
• Free tier available for basic audits

Cons

• Newer tool, still expanding feature set

2. WAVE (Web Accessibility Evaluation Tool)

Best for: Quick visual assessments of individual pages

Developed by WebAIM, WAVE has been a staple in the accessibility community for years. It provides a visual overlay on your web page, highlighting accessibility issues directly in context.

Key Features

• Browser extension for Chrome and Firefox
• Visual indicators overlaid on your page
• Contrast checking
• Structural analysis

Pros

• Excellent visual feedback
• Long track record and community trust
• Easy to use for beginners

Cons

• Only checks one page at a time (free version)
• Can be overwhelming with the number of icons displayed
• No EAA-specific reporting

3. axe DevTools

Best for: Developers integrating accessibility testing into their workflow

Created by Deque Systems, axe is arguably the most widely used accessibility testing engine. The free browser extension provides detailed technical results that developers can immediately act upon.

Key Features

• Chrome and Firefox browser extension
• Integration with browser DevTools
• Zero false positives guarantee
• Guided manual testing (paid feature)

Pros

• Industry-standard testing engine
• Developer-friendly interface
• Excellent documentation
• Can be integrated into CI/CD pipelines

Cons

• Free version limited to single-page scanning
• Advanced features require paid subscription
• Technical interface may intimidate non-developers

4. Google Lighthouse

Best for: Developers who want accessibility checks alongside performance audits

Built into Chrome DevTools, Google Lighthouse runs audits for accessibility, performance, SEO, and best practices. Its accessibility audit uses the axe engine under the hood.

Key Features

• Built into Chrome browser
• Accessibility score out of 100
• Combined with performance and SEO audits
• Available via CLI for automation

Pros

• No installation required (built into Chrome)
• Simple scoring system
• CI/CD integration possible

Cons

• Limited set of accessibility checks compared to dedicated tools
• Single-page analysis only
• Can give false sense of security with high scores

5. Pa11y

Best for: Technical teams wanting automated command-line testing

Pa11y is an open-source command-line tool and Node.js library for automated accessibility testing. It is ideal for integrating accessibility checks into development pipelines and CI/CD systems.

Key Features

• Command-line interface
• Configurable testing standards (WCAG 2.0, 2.1, Section 508)
• Dashboard for tracking issues over time
• CI/CD integration

Pros

• Fully open source
• Highly configurable
• Great for automated testing pipelines

Cons

• Requires technical knowledge to set up
• No graphical interface
• Smaller rule set than some competitors

6. Accessibility Insights for Web

Best for: Structured manual testing alongside automated checks

Developed by Microsoft, Accessibility Insights combines automated scanning with a structured manual testing process called "Assessment" that guides testers through every WCAG requirement.

Key Features

• FastPass for quick automated checks
• Full Assessment mode with step-by-step guidance
• Tab stop visualization
• Color contrast analyzer

Pros

• Excellent guided manual testing process
• Tab stop visualization is unique and very helpful
• Backed by Microsoft

Cons

• Chrome/Edge only
• Full assessment takes significant time
• Automated checks are limited compared to dedicated tools

7. ARC Toolkit

Best for: Detailed technical analysis of specific accessibility features

The ARC Toolkit by TPGi (formerly The Paciello Group) is a Chrome extension that provides detailed accessibility testing with a focus on specific component types.

Key Features

• Chrome extension
• Component-specific testing (forms, images, links, etc.)
• ARIA validation
• Color contrast analysis

Pros

• Very detailed analysis of specific elements
• Good ARIA testing capabilities
• Created by accessibility experts

Cons

• Chrome only
• Can have a learning curve
• Single-page testing only

Comparison Table

Here is a quick comparison of all seven tools:

Tool	Multi-Page	EAA-Specific	Browser Extension	CLI/API	Best For
EAAPass	Yes	Yes	No	Yes	EU compliance
WAVE	Paid	No	Yes	Yes	Visual assessment
axe DevTools	Paid	No	Yes	Yes	Developer workflow
Lighthouse	No	No	Built-in	Yes	Quick audits
Pa11y	Yes	No	No	Yes	CI/CD pipelines
Accessibility Insights	No	No	Yes	No	Manual testing
ARC Toolkit	No	No	Yes	No	Technical analysis

Which Tool Should You Choose?

The best approach is to use multiple tools, as each catches different issues. However, if you need a primary tool:

• For EU businesses focused on EAA compliance: Start with EAAPass for its EAA-specific reporting and multi-page scanning capabilities.
• For developers: Combine axe DevTools in your development workflow with EAAPass for comprehensive site-wide audits.
• For non-technical users: WAVE provides the most intuitive visual interface for understanding accessibility issues.
• For CI/CD integration: Pa11y or axe-core provide the best automation capabilities.

Remember: Automated Tools Are Just the Start

No automated tool can catch every accessibility issue. Research consistently shows that automated tools can detect approximately 30-50% of WCAG issues. The remainder requires manual testing, including:

• Meaningful alt text quality
• Logical focus order
• Content readability and understandability
• Keyboard operability of custom components
• Screen reader compatibility

Start with an automated audit using EAAPass, fix the issues it identifies, then conduct manual testing to achieve full WCAG 2.1 AA compliance. Get started with your free accessibility audit today.