Free · Accessibility · Browser-based
Heading Structure Checker
Find empty headings and skipped heading levels in an HTML snippet.
Scope: Semantic quality depends on context and entire page structure, not only numeric levels.
Try the tool
Your result appears here after you run the tool.
Private by design: tool input and output are processed within your browser. Do not paste secrets or sensitive data into any online page. No account required.
How to use this tool
Paste markup and review the order of h1 through h6 elements.
Review the result yourself before using it in an operational process or publishing it. The output is intended to be edited and checked against actual facts and applicable requirements.
Practical example
An h2 followed immediately by an h4 is flagged for review.
What this result does not establish
Semantic quality depends on context and entire page structure, not only numeric levels. A passing heuristic check or a generated document never certifies legal, security or accessibility compliance.