Analyze H1–H6 heading structure in your HTML for SEO issues, skipped levels, and accessibility.
Paste your full HTML page source or just the heading tags.
Free online heading tag analyzer that checks your page's H1–H6 structure for SEO best practices and accessibility. Paste your HTML source and instantly see a visual heading tree, a count of each heading level, and a list of issues — including missing H1, multiple H1s, skipped heading levels (e.g. H2 → H4), and headings that are too long. The tool generates an SEO score out of 100 based on the severity of detected issues. A well-structured heading hierarchy helps search engines understand page content, improves SERP rankings, and makes your page more navigable for screen reader users. No server uploads, no signup, 100% browser-based.
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