Heading Structure Checker
Paste your headings (one per line, e.g. "H1: Page Title") or raw HTML to validate hierarchy, spot skipped levels, empty headings and length issues, and get a structure-health score — all in your browser.
Heading Structure Checker
One heading per line using the H1: to H6: format, or paste the page HTML — both are supported.
Your structure analysis appears here
Enter your headings one per line (e.g. H1: Page Title) or paste HTML, then press Check Structure — you'll get a hierarchy outline, issues and a structure-health score.
How It Works
Three simple steps to validate your heading hierarchy.
Enter your headings
Type headings one per line as H1: Title or paste the page HTML with h1-h6 tags.
Review the outline
See a colour-coded hierarchy outline with flags for multiple H1s, skipped levels, empty headings and length issues.
Score & export
Check the structure-health score, follow the recommendations, then export as TXT, JSON or print.
FAQ
Common questions about the Heading Structure Checker tool.
Why is heading structure important for SEO?
Heading structure helps search engines understand the hierarchy and topics of your content. A proper H1-H6 structure improves accessibility and can help your content rank better.
How many H1 tags should a page have?
Each page should have exactly one H1 tag that describes the main topic. Multiple H1 tags can confuse search engines about the page's primary focus.
What does this tool check?
It validates that there is a single H1, heading levels do not skip, the H1 appears before H2 headings, no headings are empty, and headings are not overly long.
Can I paste raw HTML?
Yes. Paste the full page HTML and the tool extracts every h1-h6 tag. You can also list headings as plain text lines such as H1: Title.