Website SEO Checker
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Paste HTML to validate H1–H6 hierarchy, detect skips, and generate a clean heading outline.
查看最近 30 天的用户变化。
按时间查看评分波动,辅助判断近期口碑是否稳定。
同口径展示 1 天、7 天、30 天的绝对增长与增长率。
查看发布时间、版本、支持语言、最近更新和抓取时间。
查看插件说明、主要功能和适用场景。
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
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Get free on-page SEO report by 100+ parameters with the best website SEO checker
Your Single Source of Truth (SSOT) for debugging analytics implementations
This extension shows the h-Tags on page.
Scans a site for basic SEO meta information and headings
Verifies if every element on the webpage has an ID and highlights those without IDs.
To show, browse and audit (for accessibility and SEO) the headings structure