Skulpt

Free plan Web

What Skulpt is

Skulpt is a free implementation of Python that runs code in the browser, on the user’s device. It needs no preprocessing, plugins, or server-side support. Its online editor supports cut, copy, paste, undo, redo, and indentation, with shortcuts to run all code using Ctrl-Enter or just a selection using Shift-Enter.

Developers can add Skulpt to an existing webpage or HTML project by including skulpt.js or skulpt-min.js together with skulpt-stdlib.js. They can also create and host custom modules. The usage guide describes embedding Trinket examples in a page through an iframe, where people can remix examples and save work to a free Trinket account. For learning or teaching Python, the guide points to Skulpt’s project gallery.

The documentation describes Skulpt as incomplete, with some Python features missing or only partly implemented. The master branch builds and runs using Python 3.7.3 grammar, while Python 2 remains an option for projects that need it. The repository README lists modules such as math, random, turtle, time, urllib, unittest, image, DOM, and re, with support that can be complete or partial. Skulpt provides CLI and API access and source-to-source conversion. Its runtime may be licensed under MIT or PSFLv2; that dual license may not cover surrounding build-processing or testing code. Scott Graham is identified as its creator.

Who it suits

Skulpt suits people learning or teaching Python, including those using its project gallery and browser editor. It also suits developers who want to run Python code in a webpage or HTML project, add custom modules, or embed examples.

What it does well

Runs Python code entirely in the browser.
Requires no preprocessing, plugins, or server-side support.
Can be added directly to HTML or embedded in a webpage.
Supports custom modules created and hosted by users.
The runtime may be licensed under MIT or PSFLv2.

What to know first

Some Python language features are missing or only partly implemented.
The dual runtime license may not cover surrounding build-processing or testing code.
The interactive feature is described as new and still getting off the ground.

Limits

Skulpt’s Python language coverage is incomplete, with some features missing or only partly implemented. The interactive feature is described as new and still getting off the ground.

Plans

Plan	Billed and limits	Price
Skulpt	No paid plans or usage limits stated on the official pages opened	Free

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

Getting started

Visit the Skulpt website and open its online editor or project gallery.
For an HTML project, include skulpt.js or skulpt-min.js and skulpt-stdlib.js.
Write code in the editor, then use Ctrl-Enter to run it or select code and use Shift-Enter.
Create and host custom modules if your project needs them.
For embedded examples, use a Trinket example in an iframe; remix it or save work with a free Trinket account.

Verdict

Pick Skulpt for browser-based Python learning or for adding Python execution to a webpage without server-side support. Look elsewhere if your project depends on Python features that Skulpt has not implemented or only partly supports.

Questions

Is Skulpt free?

Yes. The listed Skulpt plan is free, and no paid plans or usage limits are stated on the official pages.

Where does Skulpt run?

It runs code entirely in the browser on the client side. The homepage says it needs no preprocessing, plugins, or server-side support.

Can I embed Skulpt in a webpage?

Yes. Skulpt can be embedded in an existing webpage or added directly to HTML. The usage guide says to include skulpt.js or skulpt-min.js and skulpt-stdlib.js.

Which Python versions does Skulpt support?

The homepage says the master branch builds and runs using Python 3.7.3 grammar. Python 2 remains an option for projects that need it.

Is Skulpt open source?

The runtime portion may be licensed under either MIT or PSFLv2. The homepage cautions that this dual license may not cover surrounding build-processing or testing code.

Who created Skulpt?

The homepage identifies Scott Graham as Skulpt’s creator.

Facts from Skulpt's own pages

Community support: The contributing page points users to a bug and issue tracker, contribution instructions, a mailing list, and developer documentation. · skulpt.org, 7 Oct 2026
Custom modules: Users can create and host custom modules for use in Skulpt. · skulpt.org, 7 Oct 2026
Distribution: The usage guide says to include skulpt.js or skulpt-min.js and skulpt-stdlib.js in a webpage to use Skulpt. · skulpt.org, 7 Oct 2026
Distribution files: The usage guide says to add skulpt.js or skulpt-min.js and skulpt-stdlib.js to a project to load Skulpt in HTML. · skulpt.org, 7 Oct 2026
Editor: The site’s editor supports cut, copy, paste, undo, redo, indentation, and running all or selected code with keyboard shortcuts. · skulpt.org, 7 Oct 2026
Editor controls: The online editor supports common cut, copy, paste, undo, and redo shortcuts, and runs code with Ctrl-Enter or selected code with Shift-Enter. · skulpt.org, 7 Oct 2026
Educational use: The usage guide recommends Skulpt's project gallery for people who want to learn or teach Python. · skulpt.org, 7 Oct 2026
Embedding: Skulpt can be embedded in an existing webpage or added directly to HTML. · skulpt.org, 7 Oct 2026
Execution: The homepage says code runs entirely in the browser. · skulpt.org, 7 Oct 2026
Integration: The usage guide describes embedding Trinket examples in a page through an iframe; users can remix examples and save work to a free Trinket account. · skulpt.org, 7 Oct 2026
Intended use: The usage guide presents Skulpt for learning or teaching Python and points to educational projects in its gallery. · skulpt.org, 7 Oct 2026
Interactive feature status: The homepage describes the interactive feature as new and still getting off the ground. · skulpt.org, 7 Oct 2026
Language coverage: The documentation says Skulpt is incomplete, with some Python language features missing or only partially implemented. · skulpt.org, 7 Oct 2026
License: The runtime may be licensed under either the MIT license or PSFLv2, while the homepage cautions that this dual license may not cover surrounding build-processing or testing code. · skulpt.org, 7 Oct 2026
Licensing: The homepage says Skulpt may be licensed under either the MIT license or PSFLv2, with that dual license applying to the runtime portion. · skulpt.org, 7 Oct 2026
Limitations: The documentation says Skulpt is incomplete and that parts of the Python language are missing. · skulpt.org, 7 Oct 2026
Origin: The homepage identifies Scott Graham as the creator of Skulpt. · skulpt.org, 7 Oct 2026
Product: Skulpt is an entirely in-browser implementation of Python that runs code on the client side. · skulpt.org, 7 Oct 2026
Python compatibility: The homepage says the master branch builds and runs using Python 3.7.3 grammar and that Python 2 remains an option for projects that need it. · skulpt.org, 7 Oct 2026
Server requirements: The homepage says Skulpt requires no preprocessing, plugins, or server-side support. · skulpt.org, 7 Oct 2026
Standard library: The repository README lists math, random, turtle, time, urllib, unittest, image, DOM, and re among supported or partially supported modules. · github.com, 7 Oct 2026
Support and community: The contributing page directs users to GitHub issues, a contribution guide, a discussion mailing list, and developer documentation. · skulpt.org, 7 Oct 2026
What it does: Skulpt is an entirely in-browser implementation of Python. · skulpt.org, 7 Oct 2026

Where Skulpt stands on Freedom251

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