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Heading Structure Analyzer - H1-H6 Outline

Paste HTML to see the H1–H6 heading outline and flag issues — missing or multiple H1s and skipped levels. Free and 100% client-side, for SEO and accessibility.

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How to use this tool

  1. Enter or select your input.
  2. Run the tool and review the result.
  3. Copy or download the output when available.

About this tool

Paste HTML to see the H1–H6 heading outline and flag issues — missing or multiple H1s and skipped levels. Free and 100% client-side, for SEO and accessibility.

Frequently asked questions

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This tool processes input in your browser. Files and text are not sent to our server by this page.

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