Level AASince WCAG 2.0
3.3.3 Error Suggestion
Guideline 3.3: Input Assistance – Forms help people avoid and correct mistakes.
What does the rule require?
Error messages do not just say something is wrong, they also say how to get it right.
How to get it right
Write “Please enter the date as DD/MM/YYYY, for example 24/12/2026” instead of “Invalid input”.
Who benefits most?
- People with cognitive disabilities
- Blind people
Official wording
This page explains the rule in simple words. Only the original W3C text is normative.
- “Understanding Error Suggestion” at W3C (external site)
- Techniques in the WCAG Quick Reference (external site)