Free Tool
Free Website Accessibility Checker
OverlayQA's free accessibility checker for websites scans any page against WCAG 2.2 success criteria to find barriers that prevent users with disabilities from navigating your site. It combines axe-core automated testing (300+ rules) with AI visual analysis to catch issues like insufficient contrast, missing alt text, and keyboard traps that rule-based scanners alone miss. Enter a URL to get an accessibility score, severity breakdown, and top findings in under 60 seconds. No account required.
How It Works
Enter your URL below. The checker loads your page in a real browser, runs axe-core against 300+ WCAG 2.2 rules, then applies AI visual analysis to catch issues that automated rule checks miss. You get a score from 0-100, a severity breakdown (critical, high, medium, low), and your top findings.
What This Checker Catches That Others Miss
- AI visual analysis — Detects contrast issues in images, text over complex backgrounds, and interactive element sizing problems that rule-based scanners cannot evaluate.
- Full page scrolling — Loads the page in a real browser and scrolls to trigger lazy-loaded content, so below-fold violations are not missed.
- Comprehensive axe-core scan — Tests against 300+ rules covering WCAG 2.2 Level A and AA success criteria.
How This Compares to Other Free Accessibility Checkers
| Feature | This Tool | WAVE | Lighthouse | axe DevTools |
|---|---|---|---|---|
| Automated WCAG scan | Yes | Yes | Partial | Yes |
| AI visual analysis | Yes | No | No | No |
| Fix suggestions | Yes | No | No | Pro only |
| No install needed | Yes | No | No | No |
| Free | Yes | Yes | Yes | Free tier |
The Numbers
95.9% of the top one million websites have detectable WCAG failures, with an average of 56.1 errors per page (WebAIM Million, 2025). ADA web accessibility lawsuits increased 27% in 2025 to over 3,100 federal filings. Automated scanners catch 30-40% of WCAG issues. AI visual analysis closes the gap on the visual issues that automated rules cannot evaluate.
Get the Full Extension
The free checker gives you an accessibility scan. The Chrome extension gives you the full QA workflow: capture UI bugs with screenshots and CSS context, compare designs against Figma, run accessibility audits on any page, and push structured issues to Jira, Linear, or Notion. Works on localhost, staging, and production.
Frequently Asked Questions
Is this a WCAG compliance checker? This tool checks technical WCAG 2.2 Level AA conformance by running axe-core against 300+ success criteria and adding AI visual analysis. It covers the automated-testable portion of compliance. Full WCAG compliance also requires manual testing (keyboard navigation, screen reader flows) which the Chrome extension supports.
How many accessibility issues does the average website have? The average website has 56.1 detectable accessibility errors per page, according to the WebAIM Million 2025 study. 95.9% of the top one million websites have at least one WCAG failure. The most common issues are low contrast text, missing alt text, empty links, and missing form labels.
Last updated April 2026