Heading Structure Analyzer — Audit H1-H6 Hierarchy for SEO
Free online heading structure analyzer to audit the H1-H6 hierarchy of your HTML content. Detect missing headings, improper nesting, multiple H1 tags, and empty headings. Ensure proper heading structure for better SEO rankings and WCAG accessibility compliance.
Paste HTML
SEO Tips
› Use only one H1 per page
› Use headings in sequential order
› H2s are your main section headings — use 2–5 per page
› Include your primary keyword in the H1
› Headings help Google understand content hierarchy
› Users scan headings — make them descriptive
› Heading length: H1 ≤ 70 chars, H2 ≤ 60 chars
Paste HTML or Markdown on the left
The tool will extract and visualize your H1–H6 heading structure with SEO analysis
How to Use Heading Structure Analyzer
Paste Your Content
Paste HTML or Markdown content into the input area
Choose Input Format
Select HTML or Markdown mode depending on your content type
Analyze the Structure
Click Analyze to extract all H1-H6 headings and detect issues
Review Issues
Check for missing H1, skipped levels, empty headings, or duplicate headings
Frequently Asked Questions
Proper heading structure (H1-H6) helps search engines understand the hierarchy and relevance of your content, improving readability and keyword relevance signals.
Best practice is to use one H1 tag per page that describes the main topic. Multiple H1s can confuse search engines about the primary subject.
A heading skip occurs when you jump from an H2 to an H4 without an H3 in between. This breaks the logical hierarchy and can confuse both users and search engines.
Yes, using relevant keywords in your headings helps search engines understand your content structure and can improve rankings for those terms.
Try an Example
Sample HTML with headings
H1 Sample Page Title H2 Introduction H3 Background H2 Main Content H3 Section One H4 Subsection
6 headings found · 1 H1 · 2 H2 · 2 H3 · 1 H4
Good structure — sequential hierarchy with no skipped levels
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