Heading Hierarchy Checker
Check your H1–H6 structure in seconds. Paste HTML into this free heading hierarchy checker to flag skipped levels, missing H1s, and empty headings..
Heading Structure Analyzer
Paste your content below and get instant metrics, insights, and findings — free, right in your browser.
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What is Heading hierarchy checker?
Heading Structure Analyzer — Check your H1–H6 structure in seconds. Paste HTML into this free heading hierarchy checker to flag skipped levels, missing H1s, and empty headings..
Headings are parsed from your HTML with fixed rules (case-insensitive, inner markup stripped). The score starts at 100: −25 for no H1, −10 per extra H1, −10 per skipped level, −10 per empty heading, −5 per repeated heading text. The tool reads only the HTML you paste — it never fetches your live page.
Why use this heading hierarchy checker?
Built for heading hierarchy checker
Check your H1–H6 structure in seconds. Paste HTML into this free heading hierarchy checker to flag skipped levels, missing H1s, and empty headings..
Transparent & honest
Analyzes only the HTML you paste — it cannot fetch your live page or see headings rendered by JavaScript.
Private by design
Everything runs in your browser. Your inputs never leave your device.
Works everywhere
Fully responsive — perfect on desktop, tablet, and mobile. No app needed.
Regularly updated
Regularly maintained and reviewed to ensure accuracy.
Free forever
No accounts, no limits, no watermarks. Use Heading Structure Analyzer as much as you need.
How to use Heading Structure Analyzer
- 1Paste your page HTML into the "HTML" box — at least one <h1>–<h6> tag is required.
- 2Run the tool to extract every heading in document order.
- 3Review the issues table: missing or multiple H1s, skipped levels, empty and duplicate headings.
- 4Fix the flagged headings in your CMS and re-run until the score reaches 100.
What can you do with Heading Structure Analyzer?
- H1 h2 checker — Check your H1–H6 structure in seconds.
- Heading structure seo — Check your H1–H6 structure in seconds.
Good to know
- Analyzes only the HTML you paste — it cannot fetch your live page or see headings rendered by JavaScript.
- Headings are found with pattern matching; malformed or unclosed tags may not be detected.
How it works
Headings are parsed from your HTML with fixed rules (case-insensitive, inner markup stripped). The score starts at 100: −25 for no H1, −10 per extra H1, −10 per skipped level, −10 per empty heading, −5 per repeated heading text. The tool reads only the HTML you paste — it never fetches your live page.
Examples
One H1 and no skipped levels scores 100.
Jumping from H1 to H3 flags a warning and costs 10 points.
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Frequently asked questions
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