Client-side experimentation with visual editors has its advantages, such as making optimizations easy to launch and requiring no code changes. However, it also has drawbacks like page flickering or flashing, slowing down page load speeds, and ad-blocked experiments. To address these issues, Edge worker SDKs have been developed by enabling CDN edge workers, which render experiment variants directly to the HTML served from the edge to the client, eliminating flickering, delays, and ad-blocking. This solution also enables URL redirect experiments and feature flags on the edge, making it a powerful tool for experimentation and optimization. By leveraging Edge worker SDKs, developers can unlock visual experiments without compromise and gain more control over their experimentation workflow.