Free tool · Technical

Heading Structure Analyzer

Paste HTML, get your H1–H6 outline with issues flagged. No login, no limits, everything runs in your browser.

Page HTML or markdown outlinePaste full page HTML (view-source works), or plain text using #, ##, ### for heading levels.

Paste your page's HTML source.

Review the indented heading outline.

Fix flagged issues: missing H1, skipped levels, empty or long headings.

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