Chatbot UI is an open-source, self-hostable web interface for interacting with OpenAI's API, offering a clean ChatGPT-like experience with system prompt customization, model switching, and conversation management. Built by Mckay Wrigley, it is widely used by developers who want full control over their AI chat environment without relying on OpenAI's own interface.
Chatbot UI
chatbotui.com
Completely free — no credit card required.
