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HTTP/3 (with QUIC)

HTTP/3 uses QUIC, which is a secure-by-default transport protocol. HTTP/3 improves page load times in a similar way to HTTP/2. However, the QUIC transport protocol solves TCP’s head-of-line blocking problem, meaning that performance over lossy networks can be better.

​​ Availability




​​ Enable HTTP/3

HTTP/3 is available to all plans (though it does require an SSL certificate at Cloudflare’s edge network).

To enable HTTP/3 in the dashboard:

  1. Log into the Cloudflare dashboard.
  2. Select your account and zone.
  3. Go to Speed > Optimization.
  4. Go to Protocol Optimization.
  5. For HTTP/3, switch the toggle to On.
To enable HTTP/3 with the API, send a PATCH request with the value parameter set to "on".