methodology / Modern Web / #30

HTTP/3 support

#30 · Recommended · Web Quality · weighted · Modern Web · weight 0.7% · impl implemented · method v1.2.0

Web Quality factor

This factor is part of Web Quality — the weighted 0..100 score that sits above Web Standards. Its weight depends on what kind of site is being measured. Web Standards items take priority; this factor only enters the score once Web Standards passes.

Base weight: 0.4 applied to every site type unless overridden below
Why this weight: HTTP/3 — aspirational, real benefits mostly on lossy mobile.

Per-site-type overrides

Site type	Weight	Δ vs base
E-commerce	0.6	+0.2
News / Publisher	0.5	+0.1
Personal site	0.2	-0.2
Media / Streaming	0.6	+0.2

Site types not listed inherit the base weight.

Same factor, two depths.

What we measure

HTTP/3 is the newest version of HTTP, built on QUIC. It loads faster on lossy mobile networks. Cloudflare, Fastly, and most modern CDNs support it; legacy hosts don't.

How to improve your score

Front your site with Cloudflare or another HTTP/3-capable CDN. Toggle in CDN settings.

Facts

Ticket

WEBQ-30

Scoring

Scoring formulas are versioned with the methodology. The current method (v1.2.0) maps raw measurements to pass, warn, fail. Factor weights determine how much each contributes to the composite — see the methodology index for the full table.

Cited by these standards

Standards in the Standards Library whose satisfiedBy requirement tree references this factor. Each link goes to the standard's full entry — methodology, scope, and the other factors it relies on.

HTTP/3 Performance global QUIC-over-UDP transport. Faster handshakes and resilience to packet loss on flaky networks. Increasingly standard at the CDN layer.

Version history

Version	Change	Date
v1.2.0	Factor introduced. Status: live. Scoring impl: implemented.	2026-04-25

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