The Future of UI is LLM-Generated

A new open source UI Toolkit to facilitate LLM-generated UIs. A2UI is built with A2A protocol and allows an A2A agent to send interactive components instead of just text, using a high level framework-agnostic format that can be rendered natively on any surface (starting with examples for web and mobile).

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A New Paradigm for UI Development

A2UI's core philosophy enables the creation of dynamic, and adaptable user interfaces driven by AI.

• Secure & Performant Transport

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  Built on the Agent2Agent (A2A) protocol, A2UI inherits a secure transport layer, while mitigating risks like UI injection through a clean separation of structure and data.

• LLM-Friendly Format

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  A2UI uses a streamable JSON Lines (JSONL) format designed for generative models. Transported over the A2A protocol, it enables progressive rendering and real-time UI updates.

• Truly Framework-Agnostic

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  Built for maximum portability. Render components on any platform, with initial clients for JavaScript Web Components, Flutter, and more to come.