HTTP/2Baseline · Widely available
The HTTP/2 protocol is a major revision of the HTTP network protocol, providing improved performance and efficiency by using a single TCP connection to send multiple streams of data at once.
Supported in all major browsers for at least 30 months — safe to use without fallbacks. Baseline since Sep 30, 2015. Widely available since Mar 30, 2018.
Browser support
DesktopChrome
1–40Not supported
41+Supportedsince Mar 3, 2015
Current: 155Edge
12+Supportedsince Jul 29, 2015
Current: 154Firefox
1–35Not supported
36+Supportedsince Feb 24, 2015
Current: 157Safari
1–8Not supported
9+Supportedsince Sep 30, 2015
Current: 27MobileChrome Android
18–40Not supported
41+Supportedsince Mar 11, 2015
Current: 155Firefox Android
4–35Not supported
36+Supportedsince Feb 27, 2015
Current: 157Safari iOS
1–8Not supported
9+Supportedsince Sep 16, 2015
Current: 27How to use
This feature is Baseline widely available — use it freely, no fallback needed.
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.