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CodeLab

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What CodeLab is

CodeLab is a free web-based system for interactive programming exercises used in classes. Students practice coding, testing, and predicting program behavior, receiving immediate feedback and hints for wrong answers. The listed languages are Python, Java, C++, C, and C#. Instructors can monitor usage and accomplishment, create customized exercises, and optionally use LLMs or manually review selected work. CodeLab connects with Canvas, Blackboard, Brightspace, and other learning management systems through LTI 1.1.2; LTI 1.3 is under development. It can also run as a standalone web app with workflows for organizing content, creating exercises and readings, setting deadlines, and tracking student work. The CodeLab Foundation operates and supports the service for non-profit educational institutions. The site reports use at over 400 institutions in 20 countries and analysis of more than 300 million submissions from over 700,000 students.

Who it suits

CodeLab suits programming instructors and non-profit educational institutions using exercise-based teaching. Students can use it when their course covers one of the listed languages.

What it does well

  • Free web service
  • Supports five programming languages
  • Immediate feedback and hints
  • Custom instructor exercises
  • LMS integration through LTI 1.1.2

What to know first

  • LTI 1.3 is still under development
  • Focused on programming exercises
  • Created for educational use

Plans

PlanBilled and limitsPrice
CodeLabFree service; programming classes in Python, Java, C++, C, and C#Free

As codelab.org lists them, read 11 Oct 2026. The maker's own page has the final word.

Getting started

  1. Open https://codelab.org/ in a web browser.
  2. Use the standalone web app or connect through a supported learning management system using LTI 1.1.2.
  3. Organize class content and create exercises or readings.
  4. Set deadlines and track student work.

Verdict

CodeLab centers programming classes on practical exercises with feedback and instructor tracking. Its free access and LMS connections support structured educational use.

Questions

How much does CodeLab cost?

CodeLab is free, with a listed plan price of $0.

Which languages does CodeLab support?

Python, Java, C++, C, and C#.

Which learning management systems can it connect to?

It supports Canvas, Blackboard, Brightspace, and other learning management systems through LTI 1.1.2. LTI 1.3 is under development.

Can instructors track student work?

Yes. Instructors can track student usage and accomplishment, set deadlines, and monitor student work.

Who operates CodeLab?

The CodeLab Foundation operates, develops, and supports the service.

Facts from CodeLab's own pages

Additional features
The site lists optional use of LLMs and optional manual review of selected exercises. · codelab.org, 11 Oct 2026
Founded
2002 · codelab.org, 28 Sept 2026
Instructor tools
Instructors can track student usage and accomplishment and create customized exercises. · codelab.org, 11 Oct 2026
Integration limit
LTI 1.3 is under development. · codelab.org, 11 Oct 2026
Integrations
CodeLab supports Canvas, Blackboard, Brightspace, and other learning management systems using LTI 1.1.2. · codelab.org, 11 Oct 2026
Intended users
The Foundation says it was created to make CodeLab freely available to non-profit educational institutions and support computer science education and research. · codelab.org, 11 Oct 2026
Languages
The site lists Python, Java, C++, C, and C# as supported languages. · codelab.org, 11 Oct 2026
Purpose
CodeLab is a web-based interactive programming exercise system for programming classes. · codelab.org, 11 Oct 2026
Scale
The site says CodeLab has been used at over 400 institutions in 20 countries and has analyzed over 300 million exercise submissions from more than 700,000 students. · codelab.org, 11 Oct 2026
Standalone use
The guides describe a standalone CodeLab web app and instructor workflows for setup, organizing content, creating exercises and readings, setting deadlines, and tracking student work. · codelab.org, 11 Oct 2026
Student exercises
Students can work through exercises involving coding, testing, and behavior prediction, with immediate feedback and hints for wrong answers. · codelab.org, 11 Oct 2026
Support
The CodeLab Foundation operates, develops, and supports CodeLab; the Foundation page directs questions to David Arnow. · codelab.org, 11 Oct 2026

Where CodeLab stands on Freedom251

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