Heading Structure Checker
Visualize any page's H1-H6 heading outline and catch SEO/accessibility issues: missing H1, multiple H1s, and skipped heading levels. Free.
Frequently asked
Should a page have only one H1?
Yes. One H1 describing the page, then H2s for sections and H3s nested under them. It helps both SEO and screen-reader navigation.
What's a 'skipped level'?
Jumping from H2 straight to H4 with no H3 between. It breaks the document outline that assistive tech relies on.