Overview
Paste HTML to validate H1–H6 hierarchy, detect skips, and generate a clean heading outline.
Heading Structure Checker (H1–H6) is a lightweight Chrome extension designed to help website owners, SEO specialists, content editors, and developers quickly review the structural quality of HTML headings. The extension allows you to paste raw HTML content and instantly analyze the hierarchy of heading tags from H1 to H6. It generates a clear outline, displays heading counts, and highlights common structural issues such as missing H1 tags, multiple H1s, skipped heading levels, or improperly ordered headings. All analysis is performed locally inside the browser using standard web APIs. The extension does not access web pages, does not collect data, and does not require any special permissions. Your content is never transmitted or stored externally. Key features include: Paste-based HTML analysis with no page access Automatic detection of H1–H6 heading structure Visual heading outline for quick review Summary statistics for each heading level Warnings for common hierarchy mistakes Clean, professional user interface Works fully offline with zero permissions This tool is ideal for improving content accessibility, SEO structure, and document clarity before publishing HTML content.
Details
- Version1.0.0
- UpdatedJanuary 21, 2026
- Offered bylylem297
- Size13.33KiB
- LanguagesEnglish
- Developer
Email
lylem297@gmail.com - Non-traderThis developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.
Privacy
This developer declares that your data is
- Not being sold to third parties, outside of the approved use cases
- Not being used or transferred for purposes that are unrelated to the item's core functionality
- Not being used or transferred to determine creditworthiness or for lending purposes
Support
For help with questions, suggestions, or problems, visit the developer's support site
