Heading Structure Checker
Check heading hierarchy for accessibility
HTML Source
What is Heading Structure Checker?
A heading structure checker validates HTML heading hierarchy against WCAG accessibility guidelines. It detects violations like skipped heading levels, missing H1 tags, and empty headings that prevent screen reader users from navigating content effectively.
How to use
- Step 1 — Paste your HTML markup into the input area.
- Step 2 — The checker validates heading order against WCAG 2.1 success criteria and flags each violation with severity level.
- Step 3 — Review the pass/fail checklist and export the accessibility report for your team.
Result
Run your landing page HTML through the checker and find three violations: an empty H3 tag, a jump from H1 to H3, and a second H1 in the footer — each with a specific WCAG reference.
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