NEW Python SDK Released!

Code execution made simple for every business

Open-source, sandboxed
online code execution system for humans and AI

Open SourceSelf Hostable60+ Languages

JUDGE0 IS TRUSTED BY

PRODUCTS

Powerful code execution solutions for developers and businesses worldwide

Judge0

API Platform
Judge0 API platform demonstration showing code execution in real-time

Robust, scalable, and open-source online code execution system that can be used to build a wide range of applications that need online code execution features. Some examples include AI generated code execution, competitive programming platforms, e-learning platforms, candidate assessment and recruitment platforms, online code editors, online IDEs, and many more.

  • Quick and easy installation (Self-hosted or cloud)
  • Rich and verbose API documentation
  • Scalable architecture
  • Sandboxed compilation and execution
  • Support for 60+ programming languages[1][2]
  • Support for additional files alongside the user's program
  • Support for custom input, user-defined compiler options, command-line arguments, and time and memory limits
  • Detailed execution results
  • Webhooks (HTTP callbacks)
  • Works with AI Agents

Free and open-source online code editor powered by the robust Judge0 execution engine. Perfect for developers, students, and educators who need a reliable, feature-rich coding environment accessible from any browser. Whether you're prototyping algorithms, learning new languages, conducting coding interviews, or teaching programming concepts, Judge0 IDE provides a seamless experience without the complexity of local setup.

  • Code execution in 60+ programming languages
  • No setup required
  • Advanced syntax highlighting
  • Multiple editor themes
  • Custom input, compiler flags and command line arguments
  • Real-time execution and error reporting
  • Embeddable on any website

Judge0 IDE

Online Code Editor
Judge0 IDE - Online code editor interface showing syntax highlighting, file explorer, and code execution features on macOS

A sleek, mobile-first code execution environment powered by the trusted Judge0 code execution engine. Building on top of the extensible and scalable core of Judge0, a battle-tested, sandboxed execution system, Judge0 Mobile IDE brings full code execution capabilities right to your phone with a polished, mobile-optimized experience. Available as a free app for both iOS and Android devices.

  • Execute code in 60+ programming languages
  • No setup required
  • Syntax highlighting
  • Custom input, compiler flags and command line arguments
  • Real-time execution feedback
  • Smart custom keyboard overlay
  • Mobile-optimized interface
COMING SOON

Available on App Store & Google Play

PRICING

Get started on the Basic plan for free, no credit card required

Basic
Get started, no credit card required. Great for hobby projects and POCs.
Free
Sign up
  • 50 submissions/day
  • Rate Limit of 1000 requests per hour
  • Community support
Pro
Perfect for growing teams and production apps. Get serious about scale.
€27/month
Sign up
  • 2000 submissions/day
  • €0.001 per extra submission
  • Community + email support
RECOMMENDED
Ultra
Sweet spot for established businesses. Maximum value with room to grow.
€54/month
Sign up
  • 5000 submissions/day
  • €0.001 per extra submission
  • Community + email support
Mega
For high-volume apps and enterprise teams. When you need serious throughput.
€107/month
Sign up
  • 10 000 submissions/day
  • €0.001 per extra submission
  • Community + email support

CONTACT

Have a question about Judge0? Ready to discuss your project? We're here to help.

Email Support

Send us your questions and we'll get back to you within 24 hours.

Send Email
Response in 24hEmail support

Schedule a Meeting

Book a call to discuss your project needs and how Judge0 can help.

Book a Call
Global TeamMultiple timezones

Community

Join our Discord community for peer support and discussions.

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Quick SetupGet started fast

Whether you're building the next big coding platform, integrating AI-powered code execution, or need enterprise-grade sandboxed environments, we're here to help you succeed.

Prefer email?[email protected]