PyScript lets you run Python scripts right in the browser, side by side with JavaScript, with two-way interaction between your code and the web page.

Microsoft plans to enable the Python and Ruby languages to be used for client-side development of rich Internet applications that leverage the company’s Silverlight browser plug-in technology ...

Jul 04, 2025 12:55:00 Mozilla releases 'Wasm agents' that allow AI agents to be run directly in the browser without the need to install extra apps, and uses WebAssembly to run Python-based agents ...

It's possible to take a step further with a browser extension, but this is a basic Python project that hosts a web page that you can drag and drop a file on for a visualizer.

Learn how to use Browser Use WebUI on Windows 11/10. It is a Python library that enables AI agents to navigate web pages, extract data, automate interactions, etc.