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Heading Structure Analyzer
Paste your page HTML to visualize the heading hierarchy and catch structural issues. No data is sent anywhere.
Why heading structure matters
Screen readers use headings to build a table of contents for the page. Users navigate by jumping between headings — if levels are skipped (H1 → H3), the structure becomes confusing. Each page should have exactly one H1, and heading levels should only increase by one step at a time.
xsbl detects heading issues across your entire site automatically.
Scan your site free