How does Cloudflare's 'Always Use HTTPS' feature work under the hood?

Cloudflare's 'Always Use HTTPS' feature works by intercepting all HTTP requests destined for your website. It then redirects those requests to their HTTPS equivalent. Cloudflare utilizes its global network of servers to perform this redirection efficiently, minimizing latency and ensuring a seamless user experience. This interception and redirection happen transparently, without requiring modifications to your origin server's configuration.