Heading Structure Checker
Paste the HTML of a page or article. The checker builds the heading outline and flags common problems that confuse readers, screen readers and search engines.
Paste HTML and click “Check headings”.
Runs entirely in your browser. Nothing is uploaded.
- 1Open your page, view source and copy the HTML (or paste your article HTML)
- 2Paste it into the box
- 3Fix the issues listed under the outline
Why heading structure matters
Headings are the table of contents of your page. Search engines and AI assistants use them to understand which passage answers which question, and screen-reader users navigate by them.
One H1 per page
Use a single H1 that states the topic. In most CMSs the post title is already the H1, so article bodies should start at H2.
Don't skip levels
Go from H2 to H3, not from H2 straight to H4. Skipped levels break the outline and suggest missing sections.
Heading Structure Checker FAQ
Does it fetch my URL?+
No. It only analyzes the HTML you paste, entirely in your browser, so it works for drafts and private pages too.
Should I phrase headings as questions?+
For informational content, yes for several of them. Question headings match how people search and how assistants pick answers.
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