Run Python in your browser: an offline playground with NumPy, pandas and Matplotlib

Want to test a Python idea without installing anything? The Python Playground runs real Python 3.12 inside your browser tab. Your code is never sent to a server.

How it works

The playground uses Pyodide, a full CPython build compiled to WebAssembly. It runs in a background worker, so a long loop never freezes the page.

• The first visit downloads about 10 MB. After that the browser keeps a copy, so later visits start fast and mostly work offline.
• Output from print() shows up line by line, and errors show the normal Python traceback.
• Your code is saved in this browser automatically.

Libraries you can use

• Data: NumPy, pandas and SciPy for arrays, tables and statistics.
• Charts: Matplotlib. Charts appear right below the output.
• Machine learning basics: scikit-learn for regression, classification and clustering.
• Standard library: json, re, datetime, collections, itertools, math, random, csv and more.

Installing other packages

Type a package name in the pip install box, or install from your code:

import micropip
await micropip.install("faker")

Pure-Python packages from PyPI usually work. Packages that need native drivers, a GPU or OS-level access, such as PyTorch, TensorFlow or tkinter, cannot run in a browser.

Good things to try

• Paste a small CSV, load it with pandas and print df.describe().
• Plot a sine wave with NumPy and Matplotlib.
• Practise lists, dictionaries and functions while you follow the free Python course.
• Prepare data here, then query it in the SQL Playground or tidy it in the CSV Viewer & Editor.

Why run Python in the browser

• No install, virtual environment or account.
• Works on any computer with a modern browser, including school and office machines.
• Private by design: data and code stay on your device.

Writing JavaScript instead? Use the JS/TS Playground for the same quick, private workflow.