Heading Structure Analyzer

Headings give a page a clear outline that both search engines and screen readers use to understand how the content is organized. A single descriptive h1 tells search engines the main topic, and a logical h2/h3 hierarchy maps the subtopics, which helps with relevance, featured snippets and accessibility. Messy or missing headings make a page harder to parse and can weaken how well it ranks for its sections.

Use exactly one h1 for the page's main title, then nest sections with h2, and subsections of those with h3, and so on. The key rule is to step down only one level at a time: an h2 should be followed by an h2 or an h3, never an h4. You can jump back up any number of levels (an h3 followed by a new h2 is fine), but you should not skip levels on the way down.

For most pages, no. The long-standing best practice is a single h1 that names the page topic, with everything else under h2 and below. HTML5 technically allows multiple h1s inside sectioning elements, but in practice one h1 keeps the outline unambiguous for search engines and assistive technology, so this tool warns when it finds more than one.

A skipped level is when the outline jumps down by more than one step, such as an h2 followed directly by an h4 with no h3 in between. That breaks the logical nesting and can confuse screen reader users who navigate by headings. This tool flags every jump and tells you exactly which level (or levels) were skipped so you can insert or relabel a heading.

No. It only reads the HTML you paste in, so it does not visit the URL or render scripts. If your headings are injected by client-side JavaScript, paste the rendered HTML from your browser's inspector rather than the raw view-source response so the analysis matches what users and crawlers actually see.

Yes. The analysis runs entirely in your browser with JavaScript. Nothing you paste is uploaded, logged or stored anywhere.