Heading Structure Checker

A clear heading outline helps screen-reader users navigate and helps everyone scan a page. Paste HTML (view source, then copy) and the checker builds the outline locally with the browser’s HTML parser. Nothing is fetched or executed.

Page HTML

<title>Hiking boots guide</title>
<h1>Choosing hiking boots</h1>
<h2>Fit</h2>
<h4>Toe box</h4>
<h2></h2>
<h1>Newsletter</h1>

0Headings

0H1

0Issues

Runs entirely in your browser. Your input and files are not uploaded to any server.

How to use

Open your page, view its source and copy the HTML.
Paste it into the box.
Fix the reported issues in your template or editor.

Examples

Theme with two H1s

Logo and article title are both H1 → flagged as “multiple H1”.

Skipped level

H2 followed by H4 → flagged, with the heading text shown.

Privacy

Your files and text stay in your browser while you use this tool, and ads or anonymous visit statistics do not receive them. Only your favorites and recent tools are saved on your device. Privacy policy

Want proof? Check it with your browser’s Network tab: How to check that a tool does not upload your files

Frequently asked questions

Is more than one H1 an error?

HTML allows it and Google says it is fine, but a single H1 that describes the page is the clearest structure for accessibility. The checker reports it as a warning, not an error.

Are scripts in my HTML run?

No. The HTML is parsed with DOMParser into an inert document; scripts are not executed and images are not loaded.

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