Can I run Python code in this editor?

No. This is a code editor, not an interpreter. It highlights and helps you edit Python, and you can download the file as .py, but it doesn't execute it. To run the code, install Python from python.org and run python main.py, or use a hosted notebook.

Is my code saved or uploaded?

Your code stays in your browser tab and isn't sent to a server or saved anywhere. Download it or copy it out before closing the tab, because it's gone once the page is closed. If you try to leave with changes you haven't downloaded, the browser asks you to confirm.

Which Python version does the syntax highlighting support?

The highlighting covers Python 3 syntax, including f-strings, type hints, async and await, and the walrus operator (:=). It highlights code but doesn't check it, so it won't flag errors like an undefined variable.

Can I use tabs for indentation?

Python accepts tabs or spaces as long as a block is consistent, but PEP 8, Python's official style guide, recommends 4 spaces per indentation level, and mixing tabs and spaces in one file causes a TabError in Python 3.

Python Editor Online: Syntax Highlighting

What this Python editor does

This is a lightweight, browser-based editor for writing and tidying Python code without installing anything. It gives you syntax highlighting, find and replace, word wrap, a light or dark theme, a fullscreen mode, and a one-click download as a .py file. It's useful for jotting down a script on a machine without an IDE, cleaning up a snippet before pasting it into documentation, or sharing a file.

It doesn't run your code. There's no Python interpreter in the page, so output, errors and print() statements won't appear. To run Python, see "Running your code" below.

Editor features

Feature	What it does
Syntax highlighting	Colors keywords, strings, numbers, comments and decorators so structure is easy to scan
Find and replace	Search the file and replace one or all matches
Word wrap	Wraps long lines instead of scrolling sideways
Theme	Switches between light and dark color schemes
Fullscreen	Gives the editor the whole screen for longer files
Copy / Download	Copies the code to the clipboard or saves it as `main.py`

A quick example to try

Paste this into the editor to see the highlighting at work. It uses several modern Python features, including type hints, an f-string and a dataclass:

from dataclasses import dataclass


@dataclass
class Item:
    name: str
    price: float
    quantity: int = 1

    def total(self) -> float:
        return self.price * self.quantity


cart = [Item("Notebook", 3.50, 2), Item("Pen", 1.25)]
grand_total = sum(item.total() for item in cart)
print(f"Total: ${grand_total:.2f}")  # Total: $8.25

Running your code

When you're ready to execute what you've written:

Download the file with the Download button. It saves as main.py.
Install Python if you don't have it. The official installers are at python.org.
Open a terminal in the folder where you saved the file and run python main.py (on macOS and Linux this may be python3 main.py).

New to Python? The free Python course starts with your first Python program, and the Python cheat sheet is a one-page reference for syntax.

Python style basics

Python uses indentation to define blocks, so consistent formatting matters more than in most languages. The official style guide, PEP 8, recommends:

4 spaces per indentation level, never mixing tabs and spaces,
snake_case for functions and variables, PascalCase for classes,
two blank lines between top-level functions and classes,
lines of at most 79 characters (many teams relax this to 88 or 100).

Other online editors

The same editor is available for JavaScript, JSON (with one-click formatting), and other languages from the code editors page.

Python Editor