HTML & CSS W3C Validator Pro vs Security Headers

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 Security Headers: users compared over last 90 days.

Comparison of HTML & CSS W3C Validator Pro, Security Headers
Plugin	Metric	Current	7d	30d	Daily rate (30d)	Rank	Rating	Ratings / day	Updated
HTML & CSS W3C Validator ProChrome Web Store	Users	~197	—	—	—	#2877	4.4	—	Fresh · Oct 22, 2026
Security HeadersChrome Web Store	Users	~191	—	—	—	#2924	—	—	Stale · Oct 19, 2026