SEO Tools
Heading Structure Checker
Inspect pasted HTML or a heading list for skipped levels and unclear hierarchy.
✓ Free
✓ No account
◉ Runs on this device
SEO Tools
Powering up the tool…
TOOL HEADING-STRU
What this tool does
About the heading structure checker
It extracts H1–H6 elements, visualises nesting and identifies structural oddities. A warning invites review; it is not an automatic accessibility verdict.
How to use it
- Paste full page HTML, or just the headings one per line if that is what you have.
- Read the indented outline — it shows the document tree exactly as the markup declares it.
- Review the flags for multiple H1s, skipped levels and empty headings.
- Fix the structure in your editor and re-paste to confirm the outline reads cleanly top to bottom.
Useful for
- See a long article the way a crawler or screen reader outlines it before you publish.
- Find the skipped level (an H2 jumping to an H4) that an accessibility audit will flag later.
- Untangle template pages where the theme injects its own headings around your content.
Straight answers
Heading Structure Checker FAQ
Is more than one H1 a ranking problem?
Google says multiple H1s are fine for search, but one clear H1 usually helps readers, screen-reader users and your own editors. The tool flags it for review, not as a verdict.
Do heading levels affect SEO?
Headings help search engines and assistive tech understand structure. A tidy hierarchy is a comprehension win first; treat it as quality, not a ranking trick.
Does my HTML get uploaded?
No. Parsing happens in your browser and the markup never leaves your device.