Heading Structure Checker

How to use this tool

Inspect heading hierarchy from pasted HTML. Enter your data, run the tool, then copy or download the result. Do not submit passwords, API keys or confidential data to any online tool.

Privacy

Tools designed for browser-side processing keep input in your current browser session. Network-dependent features may send a request to the service server or a third-party endpoint; this page should disclose that behavior before production release.