cd judge

A free and open-source code execution engine. Run code securely across 10 programming languages with 10x Judge0 limits.

10 Languages

Python, Node.js, TypeScript, Java, C++, C, Rust, Go, Ruby, and PHP

Secure Sandbox

Isolated execution via Linux isolate with cgroup v2

Fast

p95 latency under 500ms with real-time results

Quick Start

curl -X POST https://cdjudge.com/api/v1/submissions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"lang": "py", "code": "print(42)"}'

Get started in seconds — completely free