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Analyze any public page heading outline, H1 setup, hierarchy gaps, duplicates, empty headings, and hidden heading signals.
With an H1 followed directly by an H3, the report displays the full outline and flags the skipped H2 level. Add a target keyword to check whether it appears in both the title and H1.
Result: one H1 found; H1-H3 jump flagged; target keyword found in both H1 and title.
<h1>Technical SEO Audit</h1>
<h3>Issues Found</h3>
<h3>Issues Found</h3><h1>Technical SEO Audit</h1>
<h2>Issues Found</h2>
<h3>Crawl Errors</h3>This H1 checker reveals the actual H1-H6 structure of a page and surfaces problems that can remain hidden inside a template. Analyze a public URL or paste HTML from a draft, staging environment, or page builder.
The checker reads H1, H2, H3, H4, H5 and H6 tags. It reports their order, text, length, ID and visibility, then flags missing or multiple H1s, skipped levels, empty headings and duplicate text.
Use URL mode to inspect the HTML returned by a public page. Paste code when you need to check a draft, protected staging page, template, or markup fragment before publication.
The optional target keyword activates a real phrase check against the title tag and primary H1. The report also measures lexical overlap between the H1 and title without requiring them to be identical.
A useful hierarchy does not need to be mechanical. It should make the main topic, sections and subsections clear. Treat each warning as a review point alongside layout, search intent and content quality.
Templates and page builders can generate hidden titles, duplicate H1 tags, or headings used only for visual styling. The outline separates the effective HTML structure from what the page appears to show.
The tool does not execute JavaScript. If headings are created only after browser rendering, paste the rendered HTML or compare the report with the browser DOM inspector.
Run it before publishing, after template changes, during migrations, while reviewing translated pages, or when a ranking page does not communicate its primary topic clearly.
After checking headings, review the title, meta description, canonical and indexability. H1-H6 structure is most useful when visible content and technical signals support the same intent.
An H1 is the HTML heading normally used for the main visible title of a page. It helps users and search engines recognize the central subject of the content.
Heading is the general term for HTML headings from H1 through H6. H1 is the main level, while H2-H6 organize sections and subsections into a readable hierarchy.
Most pages benefit from one clear H1. HTML can support more complex structures, but multiple H1 tags generated without an editorial reason can make the main page title less obvious.
Yes. Select Paste HTML to analyze a draft, staging markup, or template fragment without publishing it. The code is used only for the current request and is not retained.
No. It reads server-returned or pasted HTML. If JavaScript creates the headings, copy the rendered HTML from the browser and analyze it with Paste HTML mode.
No. They can use different wording, but should support the same topic and intent. The lexical alignment percentage is a diagnostic signal rather than an automatic SEO rule.