HTTP/3 Adoption 2026: 21.6% of Top 1M Sites

    21.6% of top 1M homepages (168,654 of 782,570) load over HTTP/3, 61.7% over HTTP/2 and 16.7% still over HTTP/1.1, while 40.4% advertise HTTP/3.

    HTTP/3 share of homepages by tier
    Top 10K25.9%
    Top 100K25.5%
    Rest of top 1M21.1%

    Source: PageSpeed Matters. HTTP Archive top 1M crawl, Sept 2026, mobile.

    One lab crawl from one location; repeat visitors may connect over HTTP/3 more often.

    Source: HTTP/3 Adoption 2026: 21.6% of Top 1M Sites - PageSpeed Matters