AutoGPT.js is an open-source project that runs the AutoGPT autonomous agent framework directly in the browser. It enables users to create and run AI agents that can generate code, search the web via DuckDuckGo, and perform file operations using the Web File System Access APIs. The project supports multiple LLM backends including GPT-4 and GPT-3, and its roadmap includes integration with LangChain and web-based LLMs for improved extensibility.