Heading Structure Checker
Review pasted HTML headings for skipped levels or missing H1s. This tool runs in your browser and does not need an API key.
Use the Heading Structure Checker
Review pasted HTML headings for skipped levels or missing H1s.
Result
How to use this tool
Paste HTML containing h1–h6 elements, then run the check to see the heading sequence and common notes.
Frequently Asked Questions
Does it crawl my page?
No. It checks only the HTML snippet you paste.
Should a page have one H1 heading?
A clear main H1 is a practical structure for most pages. The important thing is that headings describe the content and form a sensible outline.
Why should heading levels follow an order?
A logical hierarchy helps readers and assistive technologies understand how sections relate to each other.
Can this tool inspect a live URL?
This tool checks HTML that you paste into it. It does not fetch or crawl a live page.