Code Runner

CodeRunner turns your phone into a real coding environment. Write code, hit run, and see real output in seconds — no setup, no terminal, no laptop required.

Whether you're learning to code, practicing for interviews, testing a quick idea, or just experimenting on the go, CodeRunner runs real code in 8 popular languages and shows you exactly what it outputs.

▶ RUN REAL CODE

Execute Python 3, JavaScript (Node), C, C++, Java, C#, Go, and Rust. Your code runs on real compilers and interpreters — not a simulation — so the output matches what you'd get on a desktop.

⌨ A REAL CODE EDITOR

Syntax highlighting, smart indentation, and a clean editor built for mobile. Switch languages instantly while keeping a separate buffer for each one, so you never lose your work.

📤 SEE THE OUTPUT

Get clear program output, including errors and runtime messages, right below your code. Perfect for debugging and understanding exactly how your program behaves.

💾 SAVE & REUSE SNIPPETS

Save your favorite code snippets and reuse them anytime. Your snippets sync automatically and work offline, so they're always with you across sessions.

✨ WHY CODERUNNER?

• 8 languages in one app

• Real execution with real output

• Fast, distraction-free mobile editor

• Save and organize reusable snippets

• Works offline for your saved code

• Clean, modern, easy-to-use interface

Great for:

• Students learning programming

• Developers testing quick ideas

• Interview and coding practice

• Anyone who wants to code without a computer

Download CodeRunner and start running real code from anywhere.