Heading Structure Checker

Visualize any page's H1–H6 hierarchy and catch structural issues instantly.

What this tool does

The Heading Structure Checker extracts every H1 through H6 from any live page and displays them as an indented tree — the document outline exactly as search engines and screen readers see it. It automatically flags the three classic problems: missing or multiple H1s, skipped heading levels (an H2 jumping straight to an H4), and empty heading tags.

Heading hierarchy is how you communicate a page's structure to machines. Google uses headings to understand what each section covers and to pull passages into SERP features like snippets and jump links; screen reader users navigate by headings, making broken hierarchy a genuine accessibility failure. The problems are almost always invisible in a browser — themes and page builders happily render an H4 to look like an H2 — which is why pages that look perfectly organized routinely fail this check.

Paste a URL, read your page's outline top to bottom, and check that it makes sense on its own: one H1 stating the topic, H2s as chapters, H3s as their subsections, no skipped levels. SirWritesALot's editor keeps this structure honest while you write — and models your heading plan on the pages already ranking.

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