H1
0
H2
0
H3
0
H4
0
H5
0
H6
0
Heading hierarchy tree will appear here
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How to Use Heading Checker
- Paste HTML markup or enter a webpage URL.
- Click "Analyze Headings".
- Review the heading breakdown counts (H1 through H6) and structure health score.
- Inspect the interactive visual heading tree to fix skipped levels.
Key Features & Advantages
- Checks for single H1 presence and optimal length
- Flags skipped heading hierarchy violations (e.g. H2 followed directly by H4)
- Displays total heading count summary table
- Interactive nested visual outline tree view
Frequently Asked Questions
While HTML5 technically allows multiple H1s, SEO best practice is to maintain exactly one H1 per page that clearly describes the primary topic.