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Tool profile
哥飞的 SEO 工具箱
Gefei's free SEO toolbox: keyword difficulty, KGR, backlink value, and SEO simulators.
Score 8.8FreeSEO
Overview
seo.web.cafe bundles site-value estimates, AdSense prechecks, demand mining, on-page audits, and three search simulators — built for indie builders learning SEO.
Use cases
SEOKeywordsCalculator