cloudflare/kitesurf

This page introduces an external open-source repository. It is not an HDATF product.

What it does

Kitesurf is an experimental browser engine for developers and automation clients that need page execution on Cloudflare Workers without Chrome or a browser container. It accepts page URLs and Chrome DevTools Protocol commands and returns browser state, screenshots, and supported PDF output. Rust components compiled to WebAssembly combine Blitz for HTML and layout, Stylo for CSS, Boa for page JavaScript, and graphics libraries for rendering. A Worker Loader binding creates separate page and renderer workers, and the renderer replays recorded scenes into image or PDF bytes. Puppeteer can connect through the browser WebSocket endpoint, with HTTP discovery and a DevTools interface also documented. Local development uses Bazelisk, Node.js 22 or newer, pnpm 9.15.4, and Wrangler, with additional GNU tar on macOS. Cloud deployment requires paid Dynamic Workers and an external authentication layer such as Cloudflare Access because the engine has no built-in authentication. It is not a complete Chrome implementation, so CDP compatibility, target-site rendering, resource use, and operating cost require independent validation.

License

Apache-2.0 Permissive, with a patent grant. Commercial use is allowed; keep the notices and state your changes.

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