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 accessibility checks 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 applicable axe-core WCAG 2.2 A/AA checks, 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

How This Compares to Other Free Accessibility Checkers

FeatureThis ToolWAVELighthouseaxe DevTools
Automated WCAG scanYesYesPartialYes
AI visual analysisYesNoNoNo
Fix suggestionsYesNoNoPro only
No install neededYesYesYesNo
FreeYesYesYesFree 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, 2026). 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, Notion, Asana, or Trello. Works on localhost, staging, and production.

Frequently Asked Questions

What does this free accessibility checker test?

This checker runs axe-core automated testing for WCAG 2.2 A/AA plus AI visual analysis that catches issues automated scanners miss, like contrast problems in images, layout accessibility barriers, and content readability issues.

How is this different from WAVE or Lighthouse?

WAVE and Lighthouse run automated rule checks only. This checker adds AI visual analysis on top of axe-core, catching visual accessibility issues that rule-based scanners miss, like text over complex backgrounds, interactive element sizing, and layout barriers.

Is this accessibility checker really free?

Yes. You can scan up to 3 URLs per day for free with no account required. The scan shows your accessibility score, violation count, severity breakdown, and detailed findings with WCAG citations. Install the Chrome extension for continuous scanning across localhost, staging, and production.

What WCAG version does this checker test against?

The checker tests against WCAG 2.2 Level AA. It covers criteria from WCAG 2.0, 2.1, and 2.2, including the requirements referenced by ADA Title II, Section 508, and the European Accessibility Act.

Is this a WCAG compliance checker?

This tool checks technical WCAG 2.2 Level AA conformance by running applicable axe-core WCAG 2.2 A/AA checks 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 2026 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.

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Last updated October 2026