Heading Hierarchy Checker
Check H1-H6 nesting and accessibility of HTML headings
Enable JavaScript to use the interactive tool.
How to use this tool · examples & limitations
Check H1-H6 nesting and accessibility of HTML headings.
Getting a reliable result
Adjust the controls and inspect the preview. Copy the result into a small test page before using it in a larger site.
Limitations to check
Browser behavior, contrast and responsive layouts need testing in the environment where the result will be used.
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