Heading Analyzer - Free Online Heading Structure Checker

How to Use the Heading Analyzer

1. Paste your content — paste HTML or plain text that contains headings into the input box
2. View heading structure — the tool instantly extracts all H1 through H6 tags and displays them in an organized hierarchy
3. Check issues — the analyzer flags duplicate H1s, skipped heading levels, missing top-level headings, and other structural problems
4. Review recommendations — each issue comes with a suggestion for fixing it

Perfect for SEO content audits, accessibility checks, and content optimization.

Features

• Full heading extraction — finds all H1-H6 tags from any HTML or text input
• Hierarchy visualization — see heading nesting at a glance with indented structure
• Issue detection — duplicate H1s, skipped levels, missing top-level headings
• Word count per heading — see length of each heading
• Real-time — updates as you paste or type
• No data sent — everything runs locally in your browser

Use Cases

• SEO audits: Check that each page has exactly one H1 and a logical hierarchy flows from H1 through H2 to H3
• Accessibility compliance: Screen reader users navigate pages by heading structure. A broken hierarchy makes content hard to navigate
• Content outline review: Before publishing, use the analyzer to verify your article outline follows a logical flow
• Migration QA: When migrating content between platforms, verify heading tags weren’t lost or corrupted

FAQ

Why is heading hierarchy important for SEO?

Search engines use heading structure to understand the topical hierarchy of your content. A clear H1 > H2 > H3 structure helps them index your page correctly and can improve rankings for target keywords.

Is it okay to have multiple H1s?

HTML5 allows multiple H1s per page, but most SEO experts recommend one H1 per page for clarity. The tool flags multiple H1s so you can make an informed decision.

What is a skipped heading level?

A skipped level happens when you jump from H2 to H4 without an H3 in between. This breaks the semantic structure and can confuse both search engines and assistive technologies.

Tips

• Use your H1 for the main page title (it should match your title tag)
• Start each major section with an H2 and break subsections into H3s
• Avoid going deeper than H4 — if you need H5 or H6, consider restructuring your content