Heading validator

heading hierarchy validator · H1–H6 · WordPress

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Paste the HTML and get a complete heading structure analysis: visual tree, numbered errors with explanations and corrective PHP code for your theme template.

Paste HTML/text with headings and click Analyze

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Paste the code and click Analyze to see heading hierarchy issues
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Heading hierarchy is critical for both screen reader accessibility and SEO ranking. In WordPress, hierarchical errors are frequent: the post title becomes the H1, but widgets, Gutenberg blocks and shortcodes can introduce out-of-sequence headings.

This validator:

  • Analyses HTML and builds the hierarchical visual tree
  • Detects: missing H1, duplicate H1s, level skips, empty headings
  • Shows each error with SEO and accessibility explanation
  • Provides concrete PHP fixes for WordPress templates
  • Generates an exportable report with tree and issue list