Cloudflare Docs
Visit SSL on GitHub
Set theme to dark (⇧+D)

Limitations for Universal SSL

Universal SSL certificates are limited by the hostnames they cover and the browsers they support.

Hostname coverage

Full setup

Universal SSL certificates only support SSL for the root or first-level subdomains such as and To enable SSL support on second, third, and fourth-level subdomains such as or, you can:

CNAME setup

On a CNAME setup zone, each subdomain has its own Universal SSL certificate and does not require additional features or purchases.

Browser support

For more on browser support, see Browser compatibility .


Universal SSL is not compatible with Cloudflare Spectrum . If you are trying to use Spectrum, use either an advanced certificate or a custom certificate .