Cloudflare Launches Kitesurf, a Browser Built for AI Agents

Cloudflare has launched Kitesurf, a cloud-hosted web browser designed specifically for AI agents rather than human users. The company says the browser is built to help AI software navigate websites, fill out forms and complete browser-based tasks without developers having to build their own browser infrastructure.

The launch comes as AI systems increasingly move beyond chatbots toward agents that can perform tasks on behalf of users. Browsers are becoming an important part of that shift because AI agents need to interact with websites much like people do.

A browser built for AI agents

Cloudflare says traditional browsers are designed around human needs, including visual interfaces, tabs, themes and extensions. AI-focused browsers instead need to prioritise factors such as context windows, performance, token usage and scalability.

They also face different security risks. AI agents interacting with websites can be exposed to threats such as prompt injection attacks, requiring developers to consider a different security model from conventional browsers.

With Kitesurf, developers can create AI software capable of navigating websites and completing tasks without having to maintain their own browser technology. The browser runs entirely on Cloudflare’s serverless Workers platform.

Cloudflare said it built Kitesurf in about 12 weeks. The browser is currently available for free in beta through Browser Run, a service that allows developers to programmatically control and interact with headless browser instances running on Cloudflare’s network.

The company is also positioning Kitesurf as a more efficient alternative to Chromium for common AI-agent workloads. Cloudflare says the browser uses significantly less CPU and memory for tasks such as taking screenshots and extracting HTML, potentially lowering the computing costs associated with running large numbers of agents.

Built from open-source technologies

Kitesurf combines several existing technologies. Its components include a modular rendering engine from Blitz, Firefox’s Stylo CSS parser and Boa JS, a Rust-based ECMAScript engine. The remaining infrastructure runs inside Cloudflare Workers.

Cloudflare says Kitesurf already passes more than 215,000 web platform tests, with hundreds of additional tests being added and passed each week.

The company also credited the open-source Rust headless browser engine Obscura as an inspiration for the project. Cloudflare’s first proof of concept was reportedly a port of Obscura to its Workers platform.

Despite being in its early stages, Cloudflare says Kitesurf can already correctly render websites and applications including TodoMVC, Wikipedia, Hacker News, the Cloudflare Blog and much of the Cloudflare dashboard.

The launch reflects a broader effort to build infrastructure specifically for the emerging agentic web, where AI systems are expected to interact directly with websites and digital services rather than return information to users.