W3C Inappropriate HTML Check

Description

The “W3C Inappropriate HTML Check” evaluates whether the W3C HTML Validator finds any markup errors in the HTML document.

Example outcome

I asked the W3C HTML validator and I observed that there is 1 HTML error.

Impact

• Visual Impairments: Structural errors may break ARIA roles, labels, and hierarchy. Landmarks and headings may be skipped or misinterpreted.
• Motor Impairments: Broken nesting can misplace focus order and navigation logic.
• Cognitive Disabilities: Confusing layout or skipped content due to parser failures.

Fixes

To address any existing HTML errors:

1. Use the W3C Validator to locate the incorrect HTML.
2. Fix it according to the Validator.

Resources

• WCAG 2.2: Understanding Success Criteria 4.1.1
• WCAG 2.2 Techniques: Technique G134: Validating web pages
• W3C Validator Tool