Here is a nifty tool to check if any public web site supports HTTP/2 protocol.
This web service will attempt to connect the given URL over HTTP/2 protocol, and report the connection information. If HTTP/2 is supported, you will get a nice green check mark . It will also include ALPN/NPN status and whether any assets were offered to be pushed from the server.
If the site does not support HTTP/2, it will attempt to figure out the type of the web server software the site is using, and refer to a guide to enable HTTP/2 for that server software. Currently, there are guides available for Apache HTTP/2 support , Nginx HTTP/2 support , and Litespeed HTTP/2 support .
Hope you find this tool useful. Kthxbye