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Heading Structure Checker

Paste your HTML code and instantly see the H1–H6 heading hierarchy with all SEO-relevant issues. Nothing is uploaded; everything runs in your browser.

Paste your HTML code and click Check Structure to see the result.

How to Check Your Heading Structure

This heading structure checker analyzes the outline of your page directly in the browser — your HTML never leaves your device. Paste the source code of your page into the box, click Check Structure, and the tool extracts every heading from H1 to H6 in document order. It shows the full hierarchy as an indented outline and flags the issues that matter most for search engines: a missing H1, more than one H1 on the page, skipped heading levels (for example jumping straight from H2 to H4), and headings that contain no text at all. A clean, logical heading structure helps Google understand what your page is about and makes it easier for readers to scan your content. No signup, no upload, no file limits — just paste, check, and fix.

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