HTML Heading Checker

Check pasted HTML for H1 count, heading structure, skipped heading levels, duplicate headings, empty headings, and outline issues.

Upload a local file or paste manually. Files are processed in your browser.

Free Online HTML Heading Checker

Check pasted HTML for H1 count, heading structure, skipped heading levels, duplicate headings, empty headings, and outline issues. This tool runs locally in your browser, so pasted HTML, URLs, and audit data stay on your device.

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