Clean Python Editor – Browser-Based Python 3 Editor with Interactive Input and Auto-Indent

Advert-Free Python Coding Without Installation or Student Accounts

Clean Python Editor is a simple, classroom-friendly Python 3 editor that runs directly in a web browser.

It is designed for teachers who want pupils to practise Python without installing additional software, creating online accounts or working around adverts and distracting website content.

The editor is supplied as a standalone HTML file. Open it in Chrome or Microsoft Edge and pupils can begin writing and running Python programs.

Key features

Runs genuine Python 3 code in the browser

Supports interactive input() statements

Clear code editor and output terminal

Automatically indents code after if, elif, else, for, while, functions and other statements ending with a colon

Automatically corrects the indentation of elif and else

Displays line numbers to help pupils identify errors

Programs can be run using the Run button or Ctrl + Enter

Programs can be saved inside the browser

Work can be downloaded as a standard .py Python file

Existing .py files can be imported and edited

Pupils can create, open and delete saved programs

Automatic draft recovery helps prevent lost work

Adjustable editor font size

Light and dark display modes

Python error messages are shown clearly in the output terminal

No adverts

No registration required

No student login required

Suitable for

Key Stage 3 Computing

GCSE Computer Science

Python programming clubs

Homework and independent practice

Schools where Python cannot easily be installed

Pupils who need a simple and uncluttered coding environment

How it works

Open the HTML file in Chrome or Microsoft Edge.

The Python engine loads inside the browser. Pupils can then write, run, save, import and download their Python programs.

Programs saved using the Save button remain on that particular browser and computer. Pupils should use the Download .py button when they need to submit their work, email it to a teacher or continue working on another computer.

The editor includes a simple starter program using input() and print(), so pupils can test the editor immediately.

Important technical information

An internet connection is required when the Python engine first loads.

Some school networks may block the external service used to load Python. If this happens, the school network administrator may need to allow access to the Pyodide content-delivery network.

The editor works best in an up-to-date version of Chrome or Microsoft Edge.

No software installation is required.

The HTML file can be shared through Microsoft Teams, OneDrive, SharePoint, Google Classroom, email or a school shared drive.