Free SEO & Accessibility Tool

Heading Structure Analyzer

Paste your HTML or Markdown content and instantly see your H1-H6 hierarchy as a visual tree, with every SEO and accessibility issue flagged and explained.

Input Type:

Paste Your Page HTML Here

Tip: right-click any webpage, choose "View Page Source," then copy and paste it here.

Structure Score

0/100

overall

Total Headings

0

found

H1 Tags

0

should be 1

Deepest Level

-

heading tag

Issues Found

0

to fix

📊 Heading Distribution

🏗️

Structure Health

Paste HTML or Markdown content to analyze...

⚠️ Issues Detected

    🌳 Heading Tree

    About This Tool

    Free Heading Structure Analyzer for SEO and Accessibility

    Our free Heading Structure Analyzer checks your page's H1 to H6 hierarchy and shows it as a visual tree. It detects the issues that hurt both search rankings and screen reader navigation, including missing H1 tags, multiple H1 tags, skipped heading levels, empty headings, and duplicate heading text.

    🎯 Key Features:

    • Visual Heading Tree - See your full H1-H6 hierarchy indented and color-coded
    • Two Input Modes - Paste raw HTML source or Markdown / plain text with # symbols
    • Structure Score - A single 0-100 score showing how healthy your hierarchy is
    • Detailed Issue Detection - Flags missing H1s, multiple H1s, skipped levels, empty headings, duplicate text, and overly long or short headings
    • Heading Distribution Chart - Visualize how many headings exist at each level
    • Privacy First - Everything runs in your browser, nothing is uploaded anywhere
    • Download Option - Save the full analysis as a text report

    📊 Understanding Your Score:

    • ✅ 80-100: Excellent - Clean hierarchy with one H1 and no skipped levels
    • ⚠️ 50-79: Needs Improvement - A few structural issues to clean up
    • ❌ Below 50: Poor - Significant heading structure problems

    💡 Heading Structure Best Practices:

    • Use exactly one H1 per page that clearly states the main topic
    • Never skip levels, go from H1 to H2 to H3 in order
    • Write descriptive headings instead of vague ones like "More Info"
    • Include relevant keywords naturally, without stuffing
    • Keep headings short and scannable, generally under 70 characters
    • Avoid duplicate heading text across the same page
    • Use heading tags for structure only, never just to make text look bigger

    ❓ Frequently Asked Questions

    Why does heading hierarchy matter for SEO?

    Search engines use your headings to understand what your page is about and how the content is organized. A clean hierarchy helps Google match your page to the right search queries and can improve your chances of earning featured snippets.

    How many H1 tags should a page have?

    Exactly one. The H1 should describe the page's main topic. Use H2 tags for additional major sections instead of adding more H1s.

    What does a skipped heading level mean?

    It means your page jumps from one heading level to a much lower one, for example going from H1 straight to H3 with no H2 in between. This breaks the logical outline that search engines and screen readers rely on.

    Does heading structure affect accessibility?

    Yes. Screen reader users often navigate a page heading by heading. A clear, sequential structure lets them jump straight to the section they need instead of listening to the entire page from the top.

    Should I include keywords in my headings?

    Yes, but naturally. Your H1 should include your primary keyword, and H2/H3 tags can include related terms where they genuinely fit. Avoid repeating the same exact phrase in every heading.

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