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Heading Structure Checker
Validate HTML heading hierarchy for SEO and accessibility.
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- Heading Structure Checker
Summary
Issues
Structure Outline
What is a Good Heading Structure?
A proper heading structure (<h1> through <h6>) creates a logical outline for your content. It helps search engines understand your page hierarchy and improves accessibility for screen reader users. Best practices include using one <h1> per page, not skipping heading levels, and using descriptive text.
How to Use
- Paste HTML — Enter HTML content containing heading tags.
- Check — Click Check Structure to analyze the heading hierarchy.
- Review issues — Errors (multiple h1, missing h1) and warnings (skipped levels) are highlighted.
- View outline — A visual tree shows the heading structure with indentation per level.
Frequently Asked Questions
How many h1 tags should a page have?
Exactly one. The <h1> tag represents the main topic of the page. Multiple <h1> tags confuse search engines and screen readers.
Can I skip heading levels (e.g. h1 to h3)?
No. Skipping heading levels creates a gap in the document outline. Always maintain a logical hierarchy (h1, h2, h3...) without skipping levels.
Is my HTML sent to a server?
No. All analysis happens in your browser using the DOM parser. Your content never leaves your device.
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