Google Code Prettify vs HTTP/3

Head-to-head usage across the sites we track.

Top sites by authority

Google Code Prettify · HTTP/3 · how many of each technology's sites sit in the web's highest authority tiers

Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.

By country

Google Code Prettify · HTTP/3 · share of sites in each country using one or the other

United States 6,733

1,141,651

India 4,454

531,962

Brazil 3,120

414,021

United Kingdom 4,039

386,042

Indonesia 2,877

294,061

Germany 3,910

289,537

Canada 3,549

280,974

Italy 2,977

273,070

Audience countries from the Chrome UX Report, top markets of either technology.

Real user performance

Median site's p75 values from the Chrome UX Report, Aug 2026. Lower is better; green meets Google's "good" threshold. This describes the sites that use each technology, not the technology's own overhead.

Sites that switched

Domains that dropped one technology and adopted the other within about a year, data nobody else gives away free.

All Google Code Prettify sites · All HTTP/3 sites