SSL/TLS

SSL/TLS protocols encrypt data in transit. Cloudflare offers free SSL certificates and flexible encryption modes for any origin configuration.

Key Ideas

Cloudflare provides free shared SSL certificates for all domains
Universal SSL — Auto-provisioned for all Cloudflare domains (free)
Custom SSL — Upload your own certificate
SSL modes: Flexible (client-to-Cloudflare only), Full (encrypted end-to-end), Full (strict with certificate validation)
Automatic HTTPS rewrites prevent mixed content