Heading Structure Analyzer
Audit H1–H6 heading structure.
About this tool
Audit the heading structure (H1 through H6) of any web page. Paste your HTML and instantly see the heading outline, spot missing H1s, multiple H1s and skipped levels that hurt SEO and accessibility.
Key Features
- Full H1–H6 outline
- Flags multiple or missing H1
- Detects skipped heading levels
- Counts headings by level
- Runs 100% in your browser
How to Use
- Paste your page's HTML source.
- Click Analyze.
- Review the outline and warnings.
- Fix any flagged issues.
Benefits
- Improve on-page SEO
- Boost accessibility
- Create a logical content hierarchy
Frequently Asked Questions
Yes — best practice is a single H1 that describes the page, followed by a logical H2–H6 hierarchy.
No. Parsing happens entirely in your browser using the DOMParser API.