Heading Structure Checker

Check the H1-H6 heading hierarchy of any page. See if headings are properly structured for SEO and accessibility.

Why heading structure matters for SEO

HTML headings (H1 through H6) create a hierarchical outline of your page content. Search engines use this hierarchy to understand what the page is about, which sections are most important, and how topics relate to each other. Good heading structure also improves accessibility for screen reader users.

Heading structure best practices

  • One H1 per page — the H1 should contain the primary topic/keyword for the page
  • Don't skip levels — go from H1 → H2 → H3, not H1 → H3 (skipping H2)
  • Use headings for structure, not styling — don't use an H2 just because you want bigger text
  • Include keywords naturally — headings are a strong on-page SEO signal, but don't stuff them
  • Keep H1 under 70 characters — similar to title tags, shorter is better

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