Gradio

Gradio wraps a Python function — often a model’s predict method — in a browser-based interface with inputs and outputs inferred from the function’s signature. Point it at an image classifier and it gives you a drag-and-drop image uploader; point it at a chatbot and it gives you a chat window.

It’s the standard way ML researchers and hobbyists share demos on Hugging Face Spaces, where thousands of Gradio apps are hosted for free. Compared to building a custom Flask or FastAPI frontend, Gradio trades flexibility for speed — a working demo in minutes rather than hours.