H1 and heading structure checker

Count the H1s on your page, see the full heading outline, and find the level jumps and empty headings that break the structure a crawler reads.

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Runs the full audit on your live site. Your report opens in your dashboard.

What this checks

This counts the H1, H2 and H3 elements on the page, reads the text of the first H1, and reports the outline. A second check walks the headings in document order and flags level jumps, an H2 followed directly by an H4, and headings that contain no text at all, which is what happens when a heading tag is used to make something look big.

Why it matters

Headings are the only structure in a document that a machine can rely on. A search engine uses the outline to work out what a page covers and which part answers which question, and an assistant uses exactly the same boundaries to decide where a quotable passage starts and stops. A page with one clear H1 and honest section headings is easier to quote, which is the same property our answer extractability check scores directly.

How to read a bad result

No H1 is a failure: the strongest statement of what a page is about is simply absent. Multiple H1s is a warning rather than a fault, since HTML5 permits it and search engines cope, but one clear H1 removes the ambiguity for free. Level jumps and empty headings usually mean headings are being chosen for their size rather than their level, and the fix is CSS rather than restructuring.

This page leads with one dimension, and the audit behind it is the whole engine: Visibility100x scores36 checks on every page it crawls, across crawlability, on page SEO, structured data, AI and GEO, content, media, performance and security. Running it here gives you the same report a paying customer gets, on a free account with no card.

Questions people ask

Can a page have more than one H1?

It is valid HTML and search engines handle it. It still weakens the signal, because two competing statements of the topic are worse than one clear one. Use a single H1 and let H2s carry the sections.

Does the H1 have to match the title tag?

No, and they usually should not match exactly. The title is written for a search result and the H1 for someone already on the page. They should agree on the topic and can differ in wording.

Do headings affect AI citation?

Yes, more than most people expect. Headings are where a model chunks a page. Sections bounded by a clear heading, with the answer in the first line, are what gets lifted into an answer.

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