Heading Structure Analyzer
Paste your page HTML or markdown to visualise the heading hierarchy. Finds missing H1s, skipped levels, duplicates, and empty headings.
Page HTML or Markdown
Supports <h1>-<h6> tags and # markdownPaste HTML or markdown to analyse heading structure
Tip: View source on any page and paste the HTML here
What is this tool for?
The Heading Structure Analyzer visualises your H1-H6 hierarchy as a tree and detects issues like missing H1 tags, skipped heading levels, duplicate headings, and empty headings that confuse both search engines and users.
Why it matters for SEO
Heading structure is how Google understands the topical hierarchy of your page. A clean H1 > H2 > H3 structure signals clear content organisation, which helps Google match your page to relevant queries. Skipped levels or missing H1s make it harder for search engines (and AI systems) to extract the main topics from your content.
Key SEO & AI elements it impacts
- H1 tag presence and uniqueness (one per page)
- Heading hierarchy for topical relevance signals
- Content structure for AI extraction and citation
- Accessibility compliance (screen readers rely on heading hierarchy)
- Featured snippet eligibility (well-structured headings improve selection)
What to expect by fixing it
Fixing heading structure issues improves how Google understands your page topics, which can broaden the queries you rank for. Pages with proper hierarchy are more likely to earn featured snippets and have their content accurately cited in AI search results.