Heading Structure Checker
Paste your HTML and check the H1–H6 hierarchy. Flags missing or multiple H1 tags, skipped heading levels, and empty headings. It runs entirely in your browser — no signup, no installation, and nothing you paste or drop leaves your device.
How to Check Your Heading Structure
This heading structure checker analyzes the outline of your page directly in the browser — your HTML never leaves your device. Paste the source code of your page into the box, click Check Structure, and the tool extracts every heading from H1 to H6 in document order. It shows the full hierarchy as an indented outline and flags the issues that matter most for search engines: a missing H1, more than one H1 on the page, skipped heading levels (for example jumping straight from H2 to H4), and headings that contain no text at all. A clean, logical heading structure helps Google understand what your page is about and makes it easier for readers to scan your content. No signup, no upload, no file limits — just paste, check, and fix.
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What is Heading Structure Checker?
Heading Structure Checker is a free online SEO tool built for SEO consultants, content teams and site owners. Paste your HTML and check the H1–H6 hierarchy. Flags missing or multiple H1 tags, skipped heading levels, and empty headings In practice you paste your page HTML, run the heading check, and then fix the missing or multiple H1s, skipped levels and empty headings it lists.
Because the analysis runs locally you can check unpublished pages, staging URLs and client sites without handing the markup to a third party.
How to use Heading Structure Checker
- Paste your page HTML.
- Run the heading check.
- Fix the missing or multiple H1s, skipped levels and empty headings it lists.
Heading Structure Checker FAQ
Is Heading Structure Checker free to use?
Yes. Heading Structure Checker is completely free and needs no account, no trial and no payment details. Every feature on the page is available without limits.
Is my data uploaded anywhere?
No. Heading Structure Checker runs entirely in your browser, so the text, file or number you enter never leaves your device.
Does Heading Structure Checker work on a phone or tablet?
Yes. It works in any modern browser on desktop, tablet and phone. There is no app to install and no account to create.
How do I use Heading Structure Checker?
Paste your page HTML. Run the heading check. Fix the missing or multiple H1s, skipped levels and empty headings it lists.