Running Python ASGI apps in the browser via Pyodide + a service worker
Simon Willison explored running Python ASGI applications directly within a web browser using Pyodide and a service worker. This approach allows server-side Python web frameworks like FastAPI or Starlette to execute client-side, leveraging WebAssembly. A key consequence is the potential for highly interactive, offline-capable web applications that reduce server load and latency by performing computations directly in the user's browser, opening new possibilities for Python web development.
Developers can now build full-stack Python web applications that run entirely in the browser, reducing server load and enabling offline capabilities.


