Google Lighthouse Accessibility Alternative: Comprehensive WCAG 2.2 vs 30% Coverage

Many developers believe that achieving a score of 100 on Chrome DevTools Google Lighthouse Accessibility guarantees compliance with the Americans with Disabilities Act. In reality, Google Lighthouse tests for fewer than 30% of WCAG success criteria, leaving major legal vulnerabilities undetected.

The 'Lighthouse 100' Accessibility Myth

Lighthouse runs a subset of automated rules designed for quick performance profiling. It checks basic items like image alt attributes and generic color contrast, but overlooks complex interactive patterns like keyboard traps, modal focus management, and WCAG 2.2 criteria.

What Lighthouse Fails to Detect

• WCAG 2.5.8 Target Size (Minimum): Touch targets smaller than 24x24px.
• WCAG 2.4.11 Focus Not Obscured: Sticky headers hiding keyboard focus rings.
• WCAG 3.3.7 Redundant Entry: Requiring users to re-enter repeated checkout information.
• Dynamic State Changes: Live region updates and screen reader announcements.

Google Lighthouse vs Rogabot Comparison

Achieving True WCAG 2.2 AA Compliance

Don't let a superficial 100 Lighthouse score lull your team into false security. Use Rogabot to perform rigorous, deep audits that truly protect your site and your users.