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 6,663

1,137,483

India 4,415

533,896

Brazil 3,096

409,200

United Kingdom 4,026

387,999

Indonesia 2,888

291,484

Germany 3,845

286,932

Italy 3,058

284,574

Canada 3,570

281,458

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, Sep 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