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Heading Structure Checker
Paste a page’s HTML to see its heading outline the way a screen reader does — and instantly catch a missing H1, skipped levels, or empty headings (WCAG 1.3.1).
What this checks
- Exactly one H1 — the page’s main title. Zero or several is a common failure.
- No skipped levels — don’t jump from H2 straight to H4; assistive tech relies on the order.
- No empty headings — a heading tag with no text confuses navigation.
Headings are how screen-reader users skim a page. Learn more in the WCAG 2.2 checklist (criterion 1.3.1).
Frequently asked questions
- Why does heading structure matter for accessibility?
- Screen-reader users navigate by jumping between headings, so a logical H1–H6 hierarchy is how they understand and skim a page. WCAG 1.3.1 requires structure to be conveyed in the markup. A missing H1 or skipped levels make a page hard to navigate.
- Should a page have more than one H1?
- Best practice is exactly one H1 per page — the main title. Multiple H1s (or none) is a common structural problem this tool flags.