How do I test for WCAG 3.3.3 compliance?

To test Error Suggestion: use automated tools like AltorLab's scanner for initial detection, then manually verify with keyboard navigation and screen reader testing. Check the specific failure modes described in the WCAG documentation.

🔵 Level AA

WCAG 3.3.3: Error Suggestion

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Success Criterion 3.3.3 — Level AA

Quick Answer

If an error is detected and suggestions are known, they must be provided to the user.

Why It Matters

Vague error messages like 'Invalid input' don't help users understand how to fix their mistake.

How to Audit

Run an automated accessibility scan to detect common Error Suggestion failures. Then manually verify with: keyboard-only navigation, a screen reader (VoiceOver on Mac, NVDA on Windows), and browser developer tools. Automated tools catch approximately 40% of Error Suggestion issues — manual testing is essential.

How to Fix

Provide specific suggestions: 'Enter a valid email like name@example.com'

Frequently Asked Questions

What is WCAG 3.3.3 Error Suggestion?

If an error is detected and suggestions are known, they must be provided to the user.

Is WCAG 3.3.3 required for ADA compliance?

WCAG 2.1 Level AA is the standard referenced in most ADA website lawsuits and DOJ guidance. All Level AA criteria including this one are relevant to legal compliance.

How do I fix WCAG 3.3.3 violations?

Provide specific suggestions: 'Enter a valid email like name@example.com'

Disclaimer: This guide is for informational purposes only and does not constitute legal advice. Consult a qualified ADA/accessibility attorney for your specific compliance situation.

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