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Heading Structure Checker

Headings are a page’s table of contents. This checker extracts every H1 to H6 element in order, shows them as an indented outline and checks the structure: one clear H1, an outline that starts with it, no skipped levels such as H2 followed by H4, no empty headings, no headings that are really paragraphs, no repeated headings and an H1 that matches the topic of the title tag.

  • Encrypted connection
  • No sign-up
  • Free to use
Analyse pasted HTML instead

How to use Heading Structure Checker

  1. Enter a page URL (or paste its HTML).
  2. Click “Check headings”.
  3. Review the outline and the checks.
  4. Copy or download the outline.

Heading Structure Checker features

Visual outline

Indented by level with flags.

H1 checks

Missing, multiple or misplaced H1.

Skipped levels

Each jump listed.

Empty and long headings

Flagged in place.

Export

Copy or download as text.

Paste mode

Analyse HTML you paste, e.g. a staging page.

When to use Heading Structure Checker

  • Auditing article templates.
  • Reviewing landing pages before launch.
  • Accessibility checks for screen-reader navigation.
  • Comparing your outline with competing pages.

Heading Structure Checker FAQ

Can a page have more than one H1?

HTML allows it and Google says it is fine, but one clear main heading is easier for readers and makes the topic unambiguous.

Why do skipped levels matter?

Screen-reader users navigate by heading level. Jumping from H2 to H4 suggests a missing section and makes the structure harder to follow.

Are hidden headings a problem?

Not necessarily – they are often used for accessibility. The tool marks them so you can check they are intentional.

Should headings contain keywords?

Use the words your readers would use. Headings help search engines understand sections, but clarity matters more than repetition.

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Why heading structure matters

Most readers scan a page before they read it, and headings are what they scan. A logical outline lets them jump to the part they need, and lets screen-reader users do the same with a single key.

Search engines use headings to understand how content is organised and which part answers which question, which can influence featured snippets and sitelinks. A template that puts the site name or sidebar titles in H1 or H2 elements pushes the real topic down the outline.

The outline shows headings in source order, which is the order assistive technology uses even if CSS moves them visually.

Privacy: the address you enter is fetched by our server only to run this check. The downloaded HTML is passed to your browser for analysis and is not stored, and the results are not saved on our side. Requests are rate-limited to keep the service fair for everyone, so if you check many pages in a row you may need to wait a few minutes.

Limits: pages are read up to 2 MB of HTML, redirects are followed up to eight hops and each request has a short timeout. Pages behind a login, servers that block automated requests and content added only by JavaScript cannot be analysed this way; for those, copy the page source from your browser and use the paste option where it is available.

Tip: fix the problems marked red first, because they matter most. Yellow warnings are worth reviewing but are often harmless in context, and blue notes are information. After a change, run the check again to confirm the result – search engines pick up the change on their next visit to the page.

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