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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.

It uses curl --http2 to perform a HEAD query which works for linux servers, windows servers, etc.

Application-Layer Protocol Negotiation 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.

Recommended for webmasters: How to choose better web hosting services.

You can also check your website using: HTTP/1 Web Server Online Tester.