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Detailed SEO Extension vs Sitechecker: catalog facts
Detailed SEO Extension	Sitechecker
Free Free, with no paid tier according to the developer.	Freemium The single-page SEO checker is free; crawling, monitoring and rank tracking are paid…
Browser extension	Web, Browser extension
Heading structure shown at a glance Checks X-Robots headers as well as meta tags	Free page audit with a score, status code and indexation status Crawler, monitoring and rank tracking in the same platform
Closed source Page-level insights only, not a full site crawl	Most features beyond the single-page checker are paid Aimed at marketers, so reports focus on SEO rather than general site health
Browser extension	Web application, Browser extension
Closed source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.