01
Browser indicator
Install the free “HTTP/2 and SPDY Indicator” extension for Chrome or Firefox — a coloured bolt means HTTP/2.
HTTP/2Verify
Does your site speak HTTP/2?
Run an instant check below, or verify yourself in the browser.
➜ ~
HTTP/2 check
Other Ways To Check
02
Online checker
Use a public HTTP/2 verification service and enter your hostname.
03
Response headers
In Firefox DevTools, the Network tab shows the protocol version for every request.
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