Heading Structure Checker
Paste HTML to review its document heading outline and accessibility warnings.
Check the H1–H6 document hierarchy
A logical heading outline helps people scan content and helps assistive technologies understand page organization.
This tool parses pasted HTML locally and flags empty headings, missing H1 elements and skipped levels.
How to use the Heading Structure Checker
- Paste the rendered HTML for the page content.
- Inspect the extracted H1 through H6 outline and warnings.
- Correct empty headings and levels that do not reflect the content hierarchy.
Practical example
A page normally uses an H1 for its main topic and H2 elements for principal sections, with H3 elements nested beneath them.
What this tool cannot guarantee
A logical outline supports understanding but does not by itself determine accessibility or search performance.
Continue this workflow with the Keyword Density Checker
Read the Structured Data and JSON-LD Guide for implementation guidance and common limitations.
Frequently asked questions
Is the Heading Structure Checker free to use?
Yes. It is available without an account or paid subscription.
Is my input uploaded or stored?
The tool works from the values you provide and does not connect to or modify your live website.
Should I review the result before using it?
Yes. Check the output for your project and test it in the intended environment before production use.