Heading Hierarchy Checker

Analyze your HTML heading structure. Detect issues like multiple H1s, skipped levels, and empty headings. Visualize the hierarchy.

Last updated: June 1, 2026

HTML Content

What is Heading Hierarchy Checker?

A heading hierarchy checker analyzes HTML content to verify that heading tags (H1-H6) follow proper semantic structure. Correct heading hierarchy is important for both SEO and accessibility — search engines use headings to understand content structure, and screen readers use them for navigation. Common issues include multiple H1 tags, skipping levels (H2 directly to H4), empty headings, and inconsistent nesting. This tool identifies all hierarchy violations and visualizes the heading tree structure.

How It Works

Paste your HTML content and the tool extracts all heading tags (H1 through H6), analyzes their order and nesting, and reports violations. It checks for: multiple H1 tags (only one per page is recommended), skipped heading levels (H2 followed by H4 without H3), empty headings (no text content), and headings used for styling rather than structure. The results show a visual tree of your heading hierarchy, highlight problems, and suggest corrections.

Common Use Cases

•Auditing page structure for SEO compliance before publishing new content
•Checking accessibility compliance for WCAG heading hierarchy requirements
•Validating CMS-generated content where editors may misuse heading levels for styling
•Reviewing article structure to ensure logical content organization and flow
•Identifying heading issues in migrated content from one CMS or format to another
•Checking multiple pages for consistent heading practices across a website