Open WebUI Documentation is a comprehensive resource for users of the Open WebUI, an extensible, feature-rich, and user-friendly self-hosted WebUI that operates entirely offline. It supports various LLM runners, such as Ollama and OpenAI-compatible APIs, providing a wide range of possibilities for enhancing chat interactions. The documentation includes detailed guides on installation, including Docker and non-Docker methods, and troubleshooting tips for common issues like connection problems. Special thanks are extended to Professors Lawrence Kim and Nick Vincent for their guidance, and the project is open-source under the MIT License. For assistance, users are encouraged to join the Open WebUI Discord community. Created by Timothy J. Baek, the Open WebUI aims to foster collaboration and innovation among its users.