Online Heading Structure Analyzer

Analyze H1, H2, and H3 tags from pasted HTML to review page hierarchy and on-page SEO structure before publishing.

Features:

• H1 Review: Detect missing or multiple H1 tags.
• Heading Outline: See headings in document order.
• Hierarchy Checks: Spot skipped heading levels and duplicate headings.
• Private Analysis: HTML is processed in your browser.

1. Why Heading Structure Matters

Good headings help users scan content and help search engines understand the page topic and section relationships.

2. Practical SEO Use

Use one clear H1, organize major sections with H2 tags, and use H3 tags for supporting subsections.