HTTP/3Baseline · Newly available
HTTP/3 is a major revision of the HTTP network protocol, providing improved performance and efficiency by using QUIC as the underlying transport protocol.
Works in the latest version of every major browser, but older devices may not support it yet. Baseline since Sep 16, 2024.
Browser support
DesktopChrome
1–86Not supported
87+Supportedsince Nov 17, 2020
Current: 155Edge
12–86Not supported
87+Supportedsince Nov 19, 2020
Current: 154Firefox
1–87Not supported
88+Supportedsince Apr 19, 2021
Current: 157Safari
1–17.6Not supported
18+Supportedsince Sep 16, 2024
Current: 27MobileChrome Android
18–86Not supported
87+Supportedsince Nov 17, 2020
Current: 155Firefox Android
4–87Not supported
88+Supportedsince Apr 19, 2021
Current: 157Safari iOS
1–17.6Not supported
18+Supportedsince Sep 16, 2024
Current: 27How to use
Every current browser supports this, but it only became Baseline on Sep 16, 2024. Use it as a progressive enhancement, or keep a fallback if you support older devices.
Example
Full syntax and examples are on MDN — see the links below.
Feature detection
There’s no simple runtime check for this feature; rely on the support table and test in your target browsers.