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judge0
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judge0

Robust, fast, scalable, and sandboxed open-source online code execution system for humans and AI.

by judge0 · GitHub
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ai-agent-toolsai-agentsai-toolsGPL-3.0HTML
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Run and test code online safely and quickly, useful for various applications like learning and assessments.

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4.4k4.3k
2026-07-072026-08-31
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📄 About

Robust, fast, scalable, and sandboxed open-source online code execution system for humans and AI.

judge0 has 4.4k stars on GitHub. It has been forked 928 times. judge0 is written mainly in HTML. It has been in active development since 2017. judge0 is available under the GPL-3.0 license. Its main topics are ai-agent-tools, ai-agents, ai-tools, code-execution.

Frequently asked questions

What is judge0?

Robust, fast, scalable, and sandboxed open-source online code execution system for humans and AI.

Is judge0 open source?

judge0 is an open-source project. It is released under the GPL-3.0 license.

Is judge0 free?

Yes. judge0 is free and open source — you can use, modify and self-host it. Its GPL-3.0 license is copyleft: if you distribute a modified version, it must remain under the same license.

What license does judge0 use?

judge0 is available under the GPL-3.0 license.

What language is judge0 written in?

judge0 is written mainly in HTML.

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