Heading Structure Analyzer

Paste HTML or page content to analyze H1–H6 hierarchy. Issues are highlighted instantly.

Raw HTML, CMS output, or any content containing H1–H6 tags. Analysis runs as you type.

Runs 100% in your browser. No data is sent to any server.

What is heading hierarchy?

Heading hierarchy is the order of H1–H6 elements on a page. The H1 is the main title (one per page). H2s are major sections, H3s subsections under H2s, and so on. Skipping levels (e.g. H2 then H4) hurts SEO and accessibility.

Why headings matter for SEO and accessibility

Search engines use headings to understand structure and topics. Screen reader users often navigate by headings. A clear, logical hierarchy improves both discoverability and usability.

Best practices for H1–H6

  • Use exactly one H1 per page for the main title
  • Do not skip levels (e.g. go from H2 to H4)
  • Keep headings concise and descriptive
  • Avoid empty headings
  • Use unique heading text where possible to avoid confusion

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Frequently Asked Questions

What is heading hierarchy?

Heading hierarchy is the order of H1–H6 tags on a page. There should be one H1 (main title), then H2s for major sections, H3s under H2s, and so on. Never skip levels (e.g. H2 then H4).

Why do headings matter for SEO and accessibility?

Search engines use headings to understand page structure and topics. Screen readers use them for navigation. A clear hierarchy helps both indexing and users.

What if my HTML has no headings?

Paste the full HTML of your page (e.g. from View Source or your CMS). The tool will report no headings and suggest adding at least one H1.

Can I paste content from a CMS or Word?

Yes. If the content includes HTML headings (H1–H6), the tool will detect them. If you paste plain text, wrap it in HTML or use a converter first.