LectionFree Tool

Heading Structure Checker

Check any live page for H1-H6 hierarchy, skipped levels, duplicate headings, and empty heading text before you ship SEO or template changes.

Free heading checkerH1-H6 auditSEO outline review
Free to runNo credit cardStructured results
Paste a public URL. The checker reads the HTML response and analyzes the headings that search engines and users can find in the fetched markup.
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What is a heading structure checker?

A heading structure checker reviews the H1-H6 tags on a page and shows whether the outline is easy to follow. It helps you catch missing H1s, repeated heading text, skipped levels like H2 to H4, and empty headings that make pages harder to scan.

This matters because headings do more than style text. They give search engines, screen readers, editors, and teammates a quick map of the page. When the outline is inconsistent, pages can look finished in the browser but still communicate their structure poorly.

Lection's free heading structure checker fetches the live HTML, counts each heading level, highlights hierarchy issues, and lets you export the full outline. That makes it useful for SEO reviews, template QA, content migrations, and no-code scraping prep when headings mark the sections you plan to extract.

How to use a heading structure checker

Step 1

Start with the URL

Paste the public page you want to audit. The checker reads the returned HTML and finds all H1-H6 elements.

Step 2

Review the warnings

Check for missing H1s, multiple H1s, skipped levels, and repeated or empty headings before you change copy or templates.

Step 3

Inspect the outline

Use the heading list to confirm the page flows in the right order and that each section label matches what the page actually covers.

What a healthy outline looks like
H1  Product comparison guide
H2  Pricing
H2  Feature breakdown
H3  Data export options
H3  Automation limits
H2  FAQ
How to read the output

If there is no H1, the page is probably missing a clear main topic statement in the fetched HTML.

If the audit finds multiple H1s, check whether the template is using H1s for visual styling instead of page structure.

If the outline skips levels, review whether the lower heading should move up or whether an intermediate heading is missing between sections.

Common Use Cases

  • Audit blog posts, landing pages, and docs pages for missing or duplicated H1 tags.
  • Review CMS templates after redesigns or content migrations.
  • Check heading hierarchy before publishing long-form SEO content.
  • Validate accessible page structure for readers using assistive technology.
  • Map repeated heading patterns before building a scraper that extracts sections by heading.

FAQ

What is the best free heading structure checker for SEO?
A useful checker should fetch the live page, count every H1-H6 heading, and point out practical issues such as missing H1s, skipped levels, empty headings, and repeated heading text.
Why does a page need exactly one H1?
Many SEO teams prefer one primary H1 because it gives the page a clear main topic. Multiple H1s can still work in some modern templates, but one strong H1 is usually the easiest structure to manage.
What does it mean when headings skip from H2 to H4?
It usually means the outline jumps deeper than expected without an intermediate section. That can make the page harder to scan and can signal that the structure is being used for styling rather than content hierarchy.
Can I check heading hierarchy on any website?
You can check public pages that return HTML and allow standard requests. Some sites block automated requests or rely heavily on client-side rendering, which can limit what any online heading checker can see.
Does this heading structure checker work on JavaScript-heavy pages?
It analyzes the HTML returned by the server. If important headings are inserted only after browser-side JavaScript runs, they may not appear in the report even if you can see them visually.
Can I export the heading outline to CSV or JSON?
Yes. After a successful check, you can export the heading list with levels, IDs, classes, paths, and HTML snippets as JSON, CSV, or Excel.

Related Resources

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Alt Text Checker

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CSS Selector Tester

Test selectors against live HTML when your extraction rules depend on headings or section wrappers.

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If you want to turn a clean page structure into a reusable scraping workflow, explore Lection or compare export and automation options on the pricing page.

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