Markdown-UI transforms responses from language models into interactive user interfaces in real time. By utilizing a specific Markdown syntax, developers can create widgets like inputs, sliders, charts, and quizzes. The process involves prompting an LLM to generate Markdown that includes markdown-ui-widget blocks. This Markdown is then parsed and rendered using the Marked library and its extension, markedUiExtension, allowing for dynamic interaction. The article outlines various widget types available, such as text inputs for collecting emails, dropdowns for selecting regions, and multiple-choice questions. Each widget type serves a different purpose, from gathering user data to displaying visual information like monthly revenue charts. For example, a button group can toggle between different service plans, while a slider allows users to adjust CPU resources easily. The widgets are designed to enhance user experience by providing immediate feedback and straightforward functionality. To make the implementation easier, the article includes a cheatsheet with syntax examples for creating each type of widget. Developers can simply copy and paste these examples, modifying them as needed for their applications. The tools are accessible, with keyboard navigation and clipboard support, making it user-friendly. Markdown-UI is open source, inviting developers to contribute on GitHub and explore the documentation for further customization and updates.