HTML Link & Heading Extractor
About HTML Heading Extractor
The HTML Heading Extractor & Document Outline Auditor parses all `<h1>` through `<h6>` heading tags from HTML source code or web pages, verifying heading hierarchy integrity and checking SEO / accessibility compliance.
How to Use HTML Heading Extractor
Step 1
Paste HTML markup into the input editor.
Step 2
Inspect the visual heading outline and automated SEO/Accessibility audit report.
Step 3
Click "Copy Heading Outline" or "Export JSON".
Practical Use Cases for HTML Heading Extractor
Auditing On-Page SEO Heading Structure (H1-H6)
Verify that a webpage contains exactly one `<h1>` tag and that subheadings follow a logical semantic hierarchy for Google search ranking.
Accessibility (WCAG) Heading Jump Testing
Catch WCAG 2.1 accessibility violations where heading levels skip inappropriately (e.g. `<h2>` followed directly by `<h4>`).
Input & Output Examples
Extracting Headings and Auditing Structure
`<h1>Main Title</h1><h2>Section</h2><h4>Subsection</h4>`
Headings: 3 | Warning: ⚠️ Heading hierarchy jump: `<h2>` $\\rightarrow$ `<h4>` (Missing `<h3>`)
Key Features & Performance
- ✓Extracts text, tag name, ID attributes, and class names from all H1-H6 headings.
- ✓SEO audit: checks for missing H1, multiple H1s, and empty heading tags.
- ✓Accessibility audit: detects skipped heading levels according to WCAG guidelines.
- ✓Exports heading outline to Markdown, JSON, or indented text.
- ✓100% Client-Side memory execution.
Key Terminology & Definitions
Heading Hierarchy (WCAG 1.3.1)
The requirement that headings form a logical semantic outline without skipping levels, allowing screen reader users to navigate efficiently.
H1 Tag (SEO)
The top-level heading on a web page representing the primary topic of the page for search engine indexing.