Free Heading Structure Analyzer
Check a page's H1–H6 outline for SEO issues.
What is the Heading Structure Analyzer?
Headings are the skeleton of a page. Search engines read the H1–H6 outline to understand what a page is about and how it's organized, and screen-reader users jump through a page by its headings. Get the structure wrong — no H1, three H1s, a jump from H2 straight to H4 — and you blur that outline for both.
This heading structure analyzer fetches any URL and lays out its full heading outline, flagging the structural issues that hurt SEO and accessibility.
Last updated: Aug 13, 2026
What does this tool do?
You enter a URL and the tool fetches the page and reads every heading (H1 through H6) in the order they appear.
It shows the outline with indentation by level and checks for a single H1, an H1 start, skipped levels and empty headings.
Key features
Full outline
Every H1–H6 in document order, indented by level.
H1 check
Flags missing or multiple H1 tags.
Order check
Catches skipped heading levels.
Empty-heading check
Finds headings with no text.
Level counts
How many of each heading level exist.
Example
Common use cases
- SEO specialists — Confirm each page has a clean outline.
- Content editors — Structure posts with logical headings.
- Accessibility reviewers — Ensure screen-reader navigation works.
- Developers — Catch templates that emit multiple H1s.
- Bloggers — Keep articles well-organized for readers.
- Agencies — Audit a client's heading hygiene.
- Migrators — Verify structure survived a redesign.
- Students — Learn how to structure a page correctly.
Benefits
- It reveals structural problems you can't see while reading.
- It confirms the single-H1 convention.
- It catches skipped levels that break the outline.
- It improves both SEO and accessibility at once.
Tips
- Use exactly one H1 that describes the page's main topic.
- Start the outline at H1 and don't skip levels going down.
- Nest sub-sections with the next level (H2 under H1, H3 under H2).
- Don't choose headings for their size — style with CSS instead.
- Include relevant keywords in headings naturally.
- Remove empty headings used only for spacing.
- Keep headings concise and descriptive.
- Re-check after template changes that affect markup.
Common mistakes to avoid
Multiple H1s
Fix: Use one H1 per page; make the rest H2–H6.
Skipping levels
Fix: Go H1→H2→H3 in order; don't jump from H2 to H4.
Using headings for styling
Fix: Pick headings by document structure and style with CSS.
Empty headings
Fix: Remove headings with no text or give them real content.
How it works
- 1
Enter a URL
The page whose headings you want to check.
- 2
Analyze
It reads every heading in document order.
- 3
Fix
See the outline and any structural issues.
Frequently asked questions
It shows your full heading outline and flags missing or multiple H1s, headings that start below H1, skipped levels (e.g. H2 to H4) and empty headings.
A logical H1–H6 order helps search engines understand your content and lets screen-reader users navigate by heading.
Your full heading outline plus checks for a single H1, an H1 start, skipped levels, and empty headings.
Conventionally yes — one H1 describing the page. Multiple H1s are allowed in HTML5 but a single H1 is the safest, clearest choice.
The heading hierarchy forms an outline; skipping from H2 to H4 breaks it for search engines and screen-reader users.
Yes, indirectly — they help search engines understand structure and topic, and well-structured content tends to perform better.
It reads the initial HTML, so headings injected later by JavaScript may not appear.
No. The page is fetched only to analyze its headings.
Conclusion
A heading structure analyzer turns your page outline into a clear checklist, so search engines and screen readers both follow your content easily. Pair it with the meta tags analyzer and readability analyzer to round out on-page SEO.