Is the Heading Structure Checker free to use?

Yes. The Heading Structure Checker is completely free with no account, sign-up, or usage limits.

Does my data get uploaded anywhere?

No. Everything you type or paste is processed locally in your browser. SEODock has no backend server that receives your content.

No installation needed. The tool runs in any modern browser on desktop or mobile.

Yes. Whatever the tool generates is yours to use on client or commercial projects without restriction.

Audit H1–H6 hierarchy from pasted HTML or Markdown.

Report100% in-browser

Runs entirely in your browser. Nothing you type is uploaded — SEODock has no server to send it to.

Paste markup

No headings detected yet.

No H1 found — every page should have one.