HTML & CSS W3C Validator Pro vs Shumway SEO Toolkit

Adoption and growth comparison · shareable link

Growth comparisons appear once each plugin has a reliable 7- or 30-day baseline.

HTML & CSS W3C Validator Pro vs Shumway SEO Toolkit: users compared over last 90 days.

Comparison of HTML & CSS W3C Validator Pro, Shumway SEO Toolkit
Plugin	Metric	Current	7d	30d	Daily rate (30d)	Rank	Rating	Ratings / day	Updated
HTML & CSS W3C Validator ProChrome Web Store	Users	~197	—	—	—	#3911	4.4	—	Outdated · Oct 22, 2026
Shumway SEO ToolkitChrome Web Store	Users	~200	—	—	—	#3890	5.0	—	Outdated · Oct 20, 2026