ChatHub is a comprehensive browser extension designed for users who want to communicate with various chatbots at the same time. It supports renowned chat models like ChatGPT, Bing, Google Bard, and Claude, allowing seamless interaction across platforms. Users can easily add this extension to Chromium-based browsers such as Chrome, Edge, or Brave. Upon installation, ChatHub facilitates prompt multi-chat functionality, auto-saves conversations, and offers a rich text formatting option. It also features a prompt library for collaborative learning and comparison of chatbot outputs. Moreover, ChatHub enhances usability with dark mode and the ability to import/export chat history and prompts, making it an ideal tool for multi-tasking and research.