Pure CSS vs W3.CSS

W3.CSS is used by more websites in our catalog: 816 use Pure CSS and 1,051 use W3.CSS.

Pure CSS sites have the higher median Ahrefs Domain Rating (Pure CSS: 32, W3.CSS: 23).

Between 2026-06 and 2026-07, Pure CSS went from 0.11% to 0.09% of all tracked sites, while W3.CSS went from 0.13% to 0.12%. W3.CSS is gaining ground faster in our index.

1 websites in our catalog use both Pure CSS and W3.CSS.

Adoption is counted from Site Stats Database's own crawl; Domain Rating comes from Ahrefs and traffic from DataForSEO. Figures reflect the sites we track and refresh at least monthly.