⚡ Now supporting cpp, java, py

JudgeLib

Plug-n-Play Code Execution Engine

Execute code safely and efficiently with built-in queue management, and resource limits. Perfect for coding platforms, educational tools, and automated testing.

Languages Supported

98%

Uptime (Render-managed services)

500–1000ms

Avg Response Time

20K–40K

Executions/Day (across 3 workers)

Choose Your Integration

Pick the option that best fits your architecture

Microservice Setup

Deploy as a standalone service with REST API endpoints

Scalable architecture

Language agnostic

Docker ready

Load balancing

NPM Library

Install directly into your Node.js application

Easy integration

TypeScript support

Zero configuration

Local execution

Powerful Features

Everything you need for safe and efficient code execution

Real-time Code Execution

Execute code instantly with live output streaming and real-time feedback for interactive experiences.

Redis Queue + Worker Load Balancing

Handle high loads efficiently with Redis-powered job queues and automatic worker scaling.

Timeout & Memory Limits

Protect your system with configurable execution timeouts and memory limits.

Ready to Get Started?

Join hundreds of developers using JudgeLib for safe code execution