How to Enable QUIC and HTTP/3 in cPanel

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HTTP/3 and QUIC Benefits

Faster connections: UDP-based protocol with 0-RTT and multiplexing.

LiteSpeed Server Support

LiteSpeed Web Server and LiteSpeed Cache plugin support HTTP/3 natively.

Enable in LiteSpeed Cache

WordPress → LiteSpeed Cache → General → QUIC.cloud → Enable HTTP/3.

Verify HTTP/3 Working

Check Protocol

Browser dev tools → Network → Protocol column should show 'h3'.

Online Tools

Use http3check.net or keycdn.com/tools/http3-test.

Requirements Table

RequirementDetails
ServerLiteSpeed Enterprise
SSLValid certificate
PluginLiteSpeed Cache
BrowserModern (Chrome, Firefox)


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