Pyodide is a Python distribution that runs in the browser and Node.js using WebAssembly, allowing you to install and run Python packages directly in the browser with micropip. It includes a robust JavaScript-Python interface for seamless integration, supports many popular Python packages including scientific libraries like NumPy and pandas, and provides full access to Web APIs when used in a browser. This project is ideal for developers who want to run Python code in web applications without requiring a backend server.