The Heading Structure Checker is a code auditor for SEO professionals and writers. A clear document outline (H1, H2, H3 tags) is critical. Search engine crawlers read these heading hierarchies to understand how content is organized. Skipping header levels (like putting an H3 before an H2) can confuse crawlers and screen readers.
This tool scans HTML text locally in your browser, maintaining full page-code privacy.
Check Heading Structure
How to Use
Paste Page HTML
Paste the raw HTML source code of your page or content draft into the input editor.
Audit Heading Structure
Click 'Check Headings'. The tool extracts and displays the heading tag outline hierarchy.
Correct Errors
Review the list to identify skipped header levels (e.g., H1 followed by H3) and verify H1 tag counts.
Why This Tool Is Useful
Verify Outline Hierarchy: Ensure headers follow nested H1-H6 levels correctly.
Spot Duplicate H1s: Confirm the page contains exactly one primary H1 header.
100% Private Run: Audit code drafts locally inside your browser window.
Practical Example
An author has an article template that uses '<h1>Header</h1>', then a section with '<h3>Sub-point</h3>'. They paste the code and the tool flags a warning: 'Skipped Level: H3 without preceding H2'. The author changes it to an H2 tag for SEO accuracy.
Limitations
Extracts heading tags from raw HTML input. It cannot parse headings rendered dynamically by complex external JavaScript scripts.