Free Online Heading Order Checker
Use this browser-based accessibility checker to review pasted HTML before release. Your input stays in your browser, and the report can be copied or downloaded for QA notes.
Heading Order Checker
Audit HTML heading hierarchy for missing H1 tags, multiple H1s, skipped heading levels, empty headings, and outline clarity.
Upload a page, component, or template. Files are processed locally in your browser.
Paste HTML, then run the accessibility audit.