What is Heading Structure Analyzer?
A heading structure analyzer parses HTML and visualizes the H1–H6 hierarchy as a tree. It reveals skipped heading levels, duplicate H1 tags, and structural issues that hurt SEO rankings and screen reader navigation.
How to use
- Step 1 — Paste your HTML source code or enter a page's HTML content.
- Step 2 — The tool extracts all heading tags and displays them as a nested tree with level indicators.
- Step 3 — Review flagged issues like skipped levels or missing H1, then export the analysis report.
Result
Paste your blog post's HTML and discover that you jump from H2 to H4 in the sidebar, creating a gap that screen readers and search crawlers penalize.
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