Heading Structure Checker

Audit H1-H6 semantic hierarchy, detect skipped heading levels, and verify single H1 rules.

Paste HTML or Markdown with Headings (H1 - H6)

Extracted Heading Hierarchy (8)Optimal Hierarchy

H1Complete Guide to Modern Project Management

H2Why Project Management Tools Matter

H3Key Benefits for Remote Teams

H3Automation & Workflow Optimization

H2Top Features to Look For

H3Gantt Charts & Kanban Boards

H3Time Tracking Integrations

H2Frequently Asked Questions

How to Use Heading Structure Checker

1Step 1

Paste your page HTML or markdown text.

2Step 2

Review the visual heading tree diagram.

3Step 3

Fix flagged issues like multiple H1s, missing H1, or skipped levels (e.g. H2 directly to H4).

While HTML5 technically allows it, SEO best practice strongly recommends exactly one H1 per page to clearly signal the primary topic to crawlers.

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