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HTTP/2 Web Server Online Tester
This tool is useful to check if a given website is hosted by a server with HTTP/2.0 protocol support.
to perform a HEAD query which works for linux servers, windows servers, etc.
egotiation requires a valid SSL certificate and TLSv1.2 or newer.
Unencrypted HTTP test is optional since all major browsers support HTTP/2 using ALPN only.
You can also check your browser's H2 and IPv6 support using
Dual-stack IP address tester
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You can also check your website using:
HTTP/1 Web Server Online Tester
ALPN + unencrypted