Why heading structure matters for SEO
Heading tags (<h1> through <h6>) create a content hierarchy that helps both users and search engines understand the structure and topics of your page. A well-organised heading hierarchy improves accessibility (screen readers use headings to navigate), readability (users scan headings to find relevant sections), and SEO (search engines weigh heading content when determining relevance).
Common heading issues
Missing H1: Every page should have exactly one H1 that describes the main topic. Multiple H1s: While technically valid in HTML5, having more than one H1 can dilute your page's focus. Skipped levels: Jumping from H2 to H4 (skipping H3) breaks the logical hierarchy and confuses assistive technologies. This tool detects all of these issues automatically.
Best practices
Use one H1 per page containing your primary keyword. Nest H2s under H1, H3s under H2, and so on — like an outline. Keep headings concise and descriptive. Don't use heading tags purely for styling; use CSS instead. This tool runs entirely in your browser — your HTML is never sent to any server.