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HTTP/3 adoption & performance trends

2 quarters of aggregate data

Unique domains per quarter

HTTP/3 -- Unique domains per quarterHTTP/3 -- Unique domains per quarter0358.9717.81076.61435.5Q2 '26Q3 '26

Median composite score

HTTP/3 -- Median composite scoreHTTP/3 -- Median composite score0255075100Q2 '26Q3 '26

Median Lighthouse performance

HTTP/3 -- Median Lighthouse performanceHTTP/3 -- Median Lighthouse performance0255075100Q2 '26Q3 '26

Median Lighthouse accessibility

HTTP/3 -- Median Lighthouse accessibilityHTTP/3 -- Median Lighthouse accessibility0255075100Q2 '26Q3 '26

How this is calculated

Each point is the median across all public HTTP/3 audits completed that quarter. Quarters with fewer than 3 audits are skipped.

Learn more about our methodology →

Raw data

QuarterUnique domainsCompositePerformanceAccessibility
Q2 '261305755188
Q3 '2632815586