Heading Hierarchy Checker
Analyze your HTML heading structure. Detect issues like multiple H1s, skipped levels, and empty headings. Visualize the hierarchy.
What is Heading Hierarchy Checker?
A heading hierarchy checker analyzes HTML content to verify that heading tags (H1-H6) follow proper semantic structure. Correct heading hierarchy is important for both SEO and accessibility — search engines use headings to understand content structure, and screen readers use them for navigation. Common issues include multiple H1 tags, skipping levels (H2 directly to H4), empty headings, and inconsistent nesting. This tool identifies all hierarchy violations and visualizes the heading tree structure.
How It Works
Paste your HTML content and the tool extracts all heading tags (H1 through H6), analyzes their order and nesting, and reports violations. It checks for: multiple H1 tags (only one per page is recommended), skipped heading levels (H2 followed by H4 without H3), empty headings (no text content), and headings used for styling rather than structure. The results show a visual tree of your heading hierarchy, highlight problems, and suggest corrections.
Common Use Cases
- •Auditing page structure for SEO compliance before publishing new content
- •Checking accessibility compliance for WCAG heading hierarchy requirements
- •Validating CMS-generated content where editors may misuse heading levels for styling
- •Reviewing article structure to ensure logical content organization and flow
- •Identifying heading issues in migrated content from one CMS or format to another
- •Checking multiple pages for consistent heading practices across a website
Frequently Asked Questions
Why does heading hierarchy matter?▼
Proper heading structure helps both search engines and screen readers understand your content hierarchy.
Can a page have more than one H1?▼
It is valid in HTML5 and Google has said it will not break your ranking. It is still usually a mistake: a single H1 makes the page's subject unambiguous for both readers and assistive technology. Multiple H1s normally indicate the heading levels are being chosen for visual size rather than structure.
Why does skipping a heading level matter?▼
Jumping from H2 straight to H4 breaks the document outline that screen readers use to let people navigate by heading. Users who move through a page heading by heading rely on the levels being sequential to understand what is nested inside what.
Should headings match my visual design?▼
No — choose the level for structural meaning and control the appearance with CSS. Picking H4 because you want smaller text is the most common cause of a broken outline. Style the heading, do not demote it.
Do headings affect SEO?▼
They help search engines understand the structure and topics of a page, and headings frequently supply the text used for featured snippets and jump links. They are a modest signal, well worth getting right, but no substitute for the content beneath them.
What makes a good heading?▼
Descriptive and specific enough to make sense out of context, because that is exactly how screen reader users and skim readers encounter them. "Configuring TLS certificates" is useful; "Step 3" and "More information" are not.
Related Tools
More from SEO Tools:
Keyword Density Checker
Check keyword density in your content. See keyword count, density percentage, and top frequent words. Free SEO content analyzer.
Word Count for SEO
Analyze content for SEO readability. Get word count, reading time, Flesch score, sentence analysis, and SEO recommendations.
Meta Tag Generator
Generate meta tags for your website with live Google search preview. Create title, description, keywords, robots, and viewport meta tags.