Heading Structure Checker

Paste HTML and see its heading outline in document order, with warnings for common problems: no H1, multiple H1s, or skipped levels (for example H1 straight to H3). Headings should describe the content beneath them, not repeat keywords.

Paste page HTML

What this tool cannot do

Pasted HTML only. It cannot fetch a live URL, and it cannot judge whether a heading's wording is good — only its level and order.

How to use it

Paste the page's HTML.
Click Check headings.
Fix skipped levels and make sure there is exactly one main H1.

Frequently asked questions

Can a page have more than one H1?

It can technically, but one clear H1 per page is the simplest, most predictable structure.

Do skipped heading levels hurt ranking?

Skipped levels are mainly an accessibility and structure problem. Fixing them makes the page easier to navigate for everyone.

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