Cloudflare has officially open-sourced Kitesurf, a browser engine purpose-built for AI agents. Running on Cloudflare Workers, Kitesurf handles HTML parsing, CSS application, JavaScript execution, and webpage screenshot rendering without relying on traditional browser containers or any Chromium process at the underlying layer. The engine supports Chrome DevTools Protocol, enabling users to drive it directly with existing tools. Unlike full desktop browsers such as Chromium, Kitesurf strips out features designed solely for human users—including tabs, appearance themes, browser extensions, and pixel-perfect rendering—and instead focuses on metrics critical to AI workloads: token consumption, context window efficiency, scalability, performance, and cost. In tasks like webpage screenshots and HTML extraction, Kitesurf consumes significantly less CPU and memory than Chromium while supporting more concurrent sessions, positioning it to handle the high-concurrency demands of AI-driven browsing workloads.