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Visualize your page’s H1–H6 outline and detect missing H1s, multiple H1s, or skipped heading levels that hurt accessibility and SEO.
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Here’s how to get the most out of heading checker.
Search engines and screen readers rely on a logical <h1> through <h6> document outline to understand topic hierarchy. Every page should contain exactly one <h1> describing the primary topic, followed by nested <h2> sections and <h3> sub-sections without skipping levels.
A few things you might want to know before you start.
Best practice for both SEO clarity and screen-reader accessibility is exactly one H1 tag per page.
Skipped heading levels break the logical document tree for assistive technologies and signal poor content structure.
Yes! Use the Paste HTML Snippet mode to validate your markup locally in your browser.
For a complete site-wide check, run our Full Website Audit tool linked below.
