How does heading hierarchy impact accessibility?

Screen reader users rely on a logical heading hierarchy to navigate and understand the relationship between sections of a page; missing or out-of-order headings can make content difficult to navigate.

Can I use this tool for automated testing?

Yes, the skill supports a --json flag that outputs results in a machine-readable format, making it ideal for integration into automated testing suites or CI/CD pipelines.

What is a skipped heading level issue?

A skipped level occurs when headings jump from a higher level (like H2) to a much lower level (like H4) without an intermediate level (H3), which breaks the logical structure for screen readers and SEO.

Why is having only one H1 tag important for SEO?

A single H1 tag clearly defines the main topic of a page for search engine crawlers, helping them understand the content's primary focus more accurately for better ranking.

HTML Heading Checker

Name: HTML Heading Checker
Author: leobrival

byleobrival

0•

Marketing Automation

Analyzes and validates HTML heading hierarchies to ensure SEO optimization and accessibility compliance.

The HTML Heading Checker skill provides a comprehensive audit of a webpage's H1-H6 structure, identifying critical issues such as missing or multiple H1 tags, skipped heading levels, and empty tags. By visualizing the heading hierarchy and providing actionable recommendations, it helps developers and SEO specialists align their content with web accessibility standards (WCAG) and search engine best practices. Whether you are performing a quick audit or generating JSON reports for automation, this tool ensures your document structure remains logical, accessible, and highly crawlable.

Key Features

010 GitHub stars

02Detection of critical SEO errors like missing or multiple H1 tags

03Detailed reporting with severity levels and actionable recommendations

04Identification of structural flaws like skipped levels and empty tags

05Accessibility auditing for WCAG 1.3.1, 2.4.6, and 2.4.10 compliance

06Comprehensive H1-H6 hierarchy validation and visualization

Use Cases

01Auditing a website's document structure for SEO improvements

02Automating page structure checks in CI/CD pipelines using JSON output

03Ensuring web accessibility compliance during frontend development

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add leobrival/serum-plugins-official check-headings

For use in Claude.ai and ChatGPT

Download Skill