Cloudflare open-sources Kitesurf, a stateless browser for AI agents built on Workers
ritakozlov · x · 2026-11-14
Cloudflare has open-sourced Kitesurf under Apache 2.0. The stateless browser for AI agents runs entirely on Workers: it parses HTML, applies CSS, executes page JavaScript, and renders screenshots with no browser container, and supports the Chrome DevTools Protocol so clients like Puppeteer can connect.
The goal is a lighter-weight, more efficient browser than Chromium for agents, scaling on demand across Cloudflare's global network. The stack is built from Rust packages compiled to WebAssembly: Blitz (HTML/DOM/layout/painting), Stylo (CSS), Boa (in-WASM JavaScript, fallback only), and Linebender libraries (text layout and 2D graphics). Developers can read, run locally, modify, and deploy their own instances.
Related event: Cloudflare Open-Sources Agent Browser Engine Kitesurf(2 posts)→
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