Heading Analyzer
Analyze heading hierarchy, detect issues, and get SEO improvement suggestions.
Free & unlimited
HTML content
All processing happens in your browser. No data is sent to any server.
About this tool
- 1
Input your HTML
Paste HTML content or a page URL to extract all heading tags (H1 through H6) from the document.
- 2
View the hierarchy tree
See headings displayed as a nested tree structure showing the parent-child relationship between levels.
- 3
Identify issues
Review warnings for missing H1 tags, skipped heading levels, or duplicate H1 elements on the page.
- 4
Export the report
Copy the heading outline as plain text for documentation or share it with your content team.
- Every page should have exactly one H1 tag that clearly describes the page topic and contains the primary keyword.
- Never skip heading levels (e.g., jumping from H2 to H4) - this confuses screen readers and weakens semantic structure.
- Use headings to create a scannable outline - readers and search engines both use headings to understand content organization.
- Visual tree diagram of heading hierarchy from H1 to H6
- Automatic detection of skipped levels and missing H1 tags
- Duplicate heading content warnings
- Heading count summary by level
- Accessibility impact notes for each detected issue
- Audit blog post structure before publishing to ensure logical heading order
- Check landing pages for SEO-friendly heading hierarchy
- Validate accessibility compliance of heading structure for WCAG requirements
- Review content outlines during editorial planning and QA
While HTML5 technically allows multiple H1 tags within sectioning elements, SEO best practice is to use a single H1 per page for clarity and ranking signals.
Yes. Search engines use headings to understand page structure and topic relevance. A clear heading hierarchy helps crawlers identify key content sections.