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 7,641

1,284,004

India 5,001

592,975

United Kingdom 4,630

436,501

Brazil 3,538

418,679

Indonesia 3,419

328,375

Canada 4,076

321,328

Germany 4,509

316,957

Italy 3,534

305,727

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, Jun 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