Heading Structure Analyzer
Audit the hierarchy of H1-H6 tags on your page. Ensure a logical structure for better accessibility and SEO. Detect missing H1s, multiple H1s, or skipped heading levels.
Free Heading Structure Analyzer
Search engines use your heading tags to build a mental model of your content. A broken hierarchy confuses algorithms and blinds screen readers. Our free tool rebuilds your heading tree visually so you can fix structure issues before they cost you rankings.
The Free SEO Hierarchy Guide: H1 Through H6
How the Free Heading Structure Analyzer Works
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Paste Your URL
Enter any webpage URL. Our server fetches the full HTML of the live page — not a cached snapshot — and runs it through a structured parser designed to extract semantic HTML elements.
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Full Heading Extraction
Every H1 through H6 tag on the page is extracted in document order, including their full text content with normalized whitespace. Decorative UI elements using heading tags for visual sizing (a common mistake) will be exposed here.
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Hierarchy Tree Visualization
Headings are rendered as a visual tree with indentation matching their nesting level, color-coded by tag type. A glance reveals whether your outline flows logically — or skips levels awkwardly.
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Automated SEO Warnings
We apply SEO best-practice rules: flag any page with zero or multiple H1 tags, alert when heading levels are skipped (e.g., H2 jumping to H4), and count distribution across all six levels.
The H1 Rule: One Per Page, No Exceptions
Despite HTML5 technically permitting multiple H1 tags inside distinct sectioning elements, SEO best practice established by Google's own guidance is unambiguous: one H1 per page. This single tag should contain your primary keyword and accurately describe the page's single, dominant topic. A second H1 forces a search engine to choose between competing topics. Multiple H1s are also a strong signal that a theme or plugin is misbehaving and injecting heading tags into sidebars or footers.
Featured Snippets and Heading Optimization
Structured heading hierarchies are one of Google's primary signals for extracting Featured Snippets. "How-to" content structured with H2s as steps, followed by concise paragraphs, is routinely pulled into position zero. Q&A content structured with H3s as questions and immediate paragraph answers triggers FAQ rich results. Our free analyzer lets you verify that your structure matches what Google's extraction algorithms prefer.
Heading Tags vs. CSS Styling: A Critical Distinction
The single biggest heading mistake developers make is using H2 or H3 tags for visual styling purposes — placing a widget title inside an H2 because it "looks better." Every page on your site then inherits "Newsletter Signup" as an H2, confusing Googlebot's topical model for literally every URL. Always use CSS classes for visual sizing of non-content elements, and reserve semantic heading tags exclusively for the logical structure of your written content.