Heading structure checker.
Enter any URL and see its full H1 to H6 outline at a glance, with warnings for a missing or duplicate H1 and any skipped levels that hurt SEO, accessibility, and AI parsing.
One plan, $199/month. No contract, cancel anytime.
A clean hierarchy (one H1, no skipped levels) helps both screen readers and AI answer engines understand your page structure. Score the page for AI citability next.
Heading checker FAQ
Why does heading structure matter?
Headings are the outline of your page. Search engines and AI answer engines use them to understand what the content covers, and screen readers use them to navigate. A logical H1 to H6 hierarchy makes a page easier to rank, cite, and read.
Should a page have only one H1?
As a rule of thumb, yes, one H1 that states the page topic, then H2s for main sections and H3s beneath them. Multiple H1s are not strictly an error in HTML5, but a single clear H1 is the safest, most widely understood pattern.
What is a skipped heading level?
Jumping from an H2 straight to an H4 without an H3 in between. It breaks the outline for assistive tech and can muddy how machines parse your sections. This tool flags every jump so you can fix the nesting.
Does it matter for AI answers?
Yes. AI answer engines chunk content by its heading structure to find quotable passages. Clear, well-nested headings that pose and answer real questions make your page far more likely to be pulled into an AI answer.
Keep exploring SmashSERP
Structure is how AI finds your answer.
SmashSERP writes answer-first, well-structured content built to get cited by AI, then tracks your citations.
One plan, $199/month. No contract, cancel anytime.