Heading Structure Checker
Scan your HTML to ensure your headings (H1-H6) form a logical, accessible, and SEO-friendly document outline.
Heading Structure Inspector
Analyze the semantic hierarchy of your HTML headings. Identify skipped levels, missing H1s, and build perfect document outlines for optimal SEO and accessibility.
Raw HTML Source
Why Heading Structure Matters
Headings (<h1> through <h6>) communicate the organization of the content on the page. Search engines use headings to index the structure and content of your web pages. Users skimming your pages by its headings get a quick overview of the content.
Accessibility (Screen Readers)
Screen reader users often use keyboard shortcuts to navigate directly from heading to heading. If you skip heading levels (e.g., jump from an H2 to an H4), screen reader users might wonder if they missed an H3, causing confusion.
Best Practices
- One H1 per page: While HTML5 technically allows multiple H1s (using sectioning elements), most SEO and accessibility experts still recommend using only one
<h1>to represent the main title of the document. - Don't skip levels: Always nest headings sequentially (H1 down to H2, H2 down to H3, etc.). It's perfectly fine to jump back up (e.g., from H4 up to H2) to start a new section.
- Don't use headings for styling: Use CSS for sizing text. Headings should be used strictly for document structure.
Related Guides
Deepen your understanding with our expert articles.