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CodeSkulptor3

by CodeSkulptor3

Free plan Web

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CodeSkulptor3's own site

What CodeSkulptor3 is

CodeSkulptor3 is a free browser-based Python interpreter made for teaching, especially to beginners. Its interface has an editor and a console for printed output and error messages. The environment implements a subset of Python 3 and adds the SimpleGui, SimpleMap, and SimplePlot graphical libraries. It is featured in Coursera's “Fundamentals of Computing” course, and the maker credits Scott Rixner with building it. Users can save programs to cloud storage under a URL or download them to a computer; anyone with a saved program's URL can access that file. Collaborative editing sessions are available, but they are temporary and are deleted in about a day. The documentation lists modern Chrome, Firefox, and Safari as supported browsers. The Python subset excludes constructs such as `try-except` and `with` statements, and external files can be loaded only over HTTPS. The maker says users are anonymous and no personal information is collected. Saved files are kept indefinitely and used to provide the service and for anonymous educational research.

Who it suits

CodeSkulptor3 suits beginners learning Python in a browser, including learners using the “Fundamentals of Computing” course. It may also fit people exploring simple graphical libraries or temporary collaborative editing.

What it does well

  • Free browser-based Python interpreter.
  • Editor and console display code output and errors.
  • Programs can be downloaded or saved under a URL.
  • Includes SimpleGui, SimpleMap, and SimplePlot libraries.

What to know first

  • Implements only a subset of Python 3.
  • Does not support try-except or with statements.
  • Collaborative sessions are deleted in about a day.
  • Anyone with a saved program URL can access it.

Limits

The free interpreter implements a subset of Python 3, including no support for `try-except` or `with` statements. Collaborative editing sessions are temporary and deleted in about a day.

Plans

PlanBilled and limitsPrice
FreeFreely available for all to useFree

As py3.codeskulptor.org lists them, read 7 Oct 2026. The maker's own page has the final word.

Getting started

  1. Open the CodeSkulptor3 website in a supported browser.
  2. Create or edit a program in the browser editor.
  3. Run the program and view printed output or errors in the console.
  4. Save the program to cloud storage under a URL or download it.
  5. Create or join a collaborative editing session if working with others.

Verdict

CodeSkulptor3 provides a teaching-oriented Python environment with a built-in editor, console, and graphical libraries. Its restricted Python subset and URL access to saved files are important considerations.

Questions

How much does CodeSkulptor3 cost?

It is free. The Free plan is listed as free.

Which platforms and browsers does it support?

CodeSkulptor3 is web-based. Its documentation lists modern Google Chrome, Mozilla Firefox, and Apple Safari as supported browsers.

Which Python version does it support?

It implements a subset of Python 3 and adds the SimpleGui, SimpleMap, and SimplePlot graphical libraries. The subset excludes constructs including `try-except` and `with` statements.

Can I save or share programs?

You can save programs to cloud storage under a URL or download them. Anyone with a saved program’s URL can access its file.

Can people edit programs together?

Users can create or join collaborative editing sessions. Sessions are temporary and deleted in about a day.

What does the maker say about privacy and saved files?

The maker says users are anonymous and CodeSkulptor3 does not collect personal information. Saved files are stored indefinitely and used to provide the service and for anonymous educational research.

Facts from CodeSkulptor3's own pages

Analytics
The site uses Plausible Analytics for aggregated usage trends, which the maker says collects no personal data and uses no cookies. · py3.codeskulptor.org, 7 Oct 2026
Browser support
The documentation lists modern Google Chrome, Mozilla Firefox, and Apple Safari as supported browsers. · py3.codeskulptor.org, 7 Oct 2026
Collaboration
Users can create or join collaborative editing sessions, which are temporary and are deleted in about a day. · py3.codeskulptor.org, 7 Oct 2026
Course use
It is featured in the Coursera course “Fundamentals of Computing.” · py3.codeskulptor.org, 7 Oct 2026
Editor and console
The browser interface includes a Python editor and a console that displays printed output and error messages. · py3.codeskulptor.org, 7 Oct 2026
Founded
2012 · py3.codeskulptor.org, 28 Sept 2026
Free plan
Yes · py3.codeskulptor.org, 20 Sept 2026
HTTPS requirement
Programs can load external files only over HTTPS; resources hosted by CodeSkulptor support HTTPS. · py3.codeskulptor.org, 7 Oct 2026
Integrations and services
The maker lists Google Cloud Storage, Firebase Realtime Database, and Google Maps Platform among the services CodeSkulptor3 uses. · py3.codeskulptor.org, 7 Oct 2026
Maker credit
The maker credits Scott Rixner with building CodeSkulptor3. · py3.codeskulptor.org, 7 Oct 2026
Privacy
The maker says CodeSkulptor3 does not collect personal information and users are anonymous. · py3.codeskulptor.org, 7 Oct 2026
Purpose
CodeSkulptor3 is a browser based Python interpreter created for teaching Python, especially to beginners. · py3.codeskulptor.org, 7 Oct 2026
Python limitations
The documented subset does not support constructs including `try-except` statements and `with` statements. · py3.codeskulptor.org, 7 Oct 2026
Python support
It implements a subset of Python 3 and adds the SimpleGui, SimpleMap, and SimplePlot graphical libraries. · py3.codeskulptor.org, 7 Oct 2026
Save and download
Users can save programs to cloud storage under a URL and download a saved program to their computer. · py3.codeskulptor.org, 7 Oct 2026
Saved file use
Saved files are stored indefinitely, and the maker says they are used to provide the service and for anonymous educational research. · py3.codeskulptor.org, 7 Oct 2026
URL access
Anyone with a saved CodeSkulptor3 URL can access the file associated with that URL. · py3.codeskulptor.org, 7 Oct 2026

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