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Now with AI-powered code assistance

Write Code.
Run instantly.
Learn.

A blazing-fast online code editor and compiler. Write, run, and share code in 4 languages — no setup needed.

Learn to program with RunCode.

Start coding for free →
2M+
Unit tests
4
Languages
650+
Coding Tasks
main.cs
main.cpp
main.java
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// Welcome to RunCode ✨
using System;

class Program
{
  static string Greet(string name)
  {
    return $"Hello, {name}! 🚀";
  }

  static void Main()
  {
    string[] languages = new string[] {
      "Java", "Python", "C#", "C++"
    };

    Console.WriteLine(Greet("Student"));
    Console.WriteLine($"— {languages.Length} languages ready");
  }
}
Output
Hello, Student! 🚀 — 4 languages ready
✦ Features

Everything you need to master the basics of programming

Powerful tool designed for students and developers who want to understand code better.

⚡

Instant execution

Run your code with our optimized cloud-based compilers and interpreters.

🤖

AI feedback

Get intelligent hints powered by advanced AI models.

🧪

Interactive tests

Run your code and explore each test case with inputs, outputs, and feedback.

🎯

Challenge Modules

Review and apply your knowledge with more complex exercises.

📱

Code Anywhere

Fully responsive editor that works beutifully in your browser on any device.

🔒

Secure Sandbox

Every code execution in an isolated, secure sandbox environment with zero risk.

⟨/⟩ Languages

4 languages supported

We've got your favourite programming language covered.

Java
Python
C#
C++
→ How It Works

Start coding in seconds

No installations, no configurations. Just open your browser and start building.

1

Write Your Code

Pick from 4 supported programming languages.

2

Write Your Code

Use our intelligent editor with syntax highlighting and autocompletion assistance.

3

Run & Test

Execute you code and review tests instantly.

♡ Testimonials

Loved by students

Join thousands of students who use learn codeing faster and more easily with RunCode.

★★★★★

RunCode completely replaced my local dev environment for quick prototyping. The speed is insane — I can test ideas in seconds.

SK

Sarah Kim

Informatyka, SGGW w Warszawie

★★★★★

I use RunCode to teach my students. The ability to share code snippets with a single link has been a game-changer for my classes.

MR

Marcus Rodriguez

Informatyka, UJ

★★★★★

The AI code assistant catches bugs before I even finish typing. It's like having a brilliant pair programmer always by my side.

AP

Aisha Patel

Informatyka techniczna, PWr

✦ Pricing

RunCode is an educational and research platform

The goal of our research is to improve the understanding of how people learn programming. If you would like to gain access to the service and participate in the study, sign up by filling out the form.
The service is free for students.

The platform was created by dr Maciej Pankiewicz (Institute of Information Technology, SGGW, Warsaw, Poland)