Kitesurf is now open source
Cloudflare has open-sourced Kitesurf, a stateless browser engine for AI agents that runs on Workers, enabling developers to deploy and modify it on their own Cloudflare accounts.
Cloudflare announced the open sourcing of Kitesurf, a stateless browser designed for AI agents, which operates entirely on Cloudflare Workers. The project was first introduced in August with follow-up updates in September, including WebMCP support and new APIs. Developers can now access the code on GitHub under the Apache 2.0 license, allowing them to run, modify, and deploy their own instances on Cloudflare Workers.
Kitesurf parses HTML, applies CSS, executes JavaScript, and renders screenshots without requiring a traditional browser container. It supports the Chrome DevTools Protocol (CDP), enabling compatibility with tools like Puppeteer. The engine aims to provide a lightweight alternative to full browsers such as Chromium, optimizing CPU and memory usage while scaling dynamically across Cloudflare’s global Workers network.
The open-source release includes three core components: the Engine for managing browser sessions, PageScript for executing page JavaScript, and PageRenderer for rendering results. These components are distributed as separate Rust packages compiled to WebAssembly within the repository’s packages directory. Developers can build and run Kitesurf locally by cloning the repository, installing dependencies, and starting the engine via the provided CLI.
To deploy Kitesurf, developers must use a Workers Paid plan, as the engine relies on Dynamic Workers to create isolated instances for pages. Cloudflare encourages community contributions, including code, bug reports, and documentation improvements, while emphasizing compatibility and reliability enhancements. The project is under active development, with updates available via the blog, changelog, and Discord channel.