Is it possible to use Cloudflare's Origin Shield with Amazon S3?

Yes, Cloudflare's Origin Shield can be used with Amazon S3. Origin Shield acts as an additional caching layer between Cloudflare's edge network and your S3 origin. This further reduces load on S3, improves cache hit ratios, and lowers latency, especially for frequently accessed content. Configure Origin Shield in your Cloudflare settings, specifying your S3 bucket's website endpoint as the origin.