Practice coding with an AI mentor by your side.
CodeXGround is a lightweight online IDE for JavaScript and Python. Write code, run it instantly, and get AI-powered feedback on bugs, style, and performance.
No signup required. Your code stays in your browser.
function fibonacci(n) { if (n < 2) return n; return fibonacci(n - 1) + fibonacci(n - 2); } for (let i = 0; i < 10; i++) { console.log(`fib(${i}) = ${fibonacci(i)}`); }
Everything you need to practice
A focused set of tools designed for learning, experimenting, and shipping small ideas faster.
AI Mentor
Get instant feedback on logical mistakes, best practices, readability, and performance.
Instant Execution
Run JavaScript in a browser sandbox or execute Python with Pyodide WebAssembly.
Professional Editor
Monaco Editor with syntax highlighting, line numbers, auto-indentation, and code folding.
Light & Dark Themes
Switch between light and dark mode. Your preference is saved automatically.
Built-in Console
See program output, console logs, and runtime errors in a modern terminal panel.
Always Improving
Ask the AI to refactor your solution and learn cleaner, more idiomatic patterns.
How it works
Three simple steps from idea to working code.
Write
Open the playground and start typing JavaScript or Python in a full-featured Monaco editor.
Run
Click Run Code to execute your program and see the output in the built-in console.
Improve
Use Check Issues or Improve to get AI guidance and level up your solution.
Two languages, one playground
Switch between JavaScript and Python with a single click.
JavaScript
Run modern JS instantly in the browser. Perfect for algorithms, DOM experiments, and quick prototypes.
Python
Execute Python via Pyodide. Great for data exercises, scripting practice, and learning fundamentals.
Ready to start coding?
Jump into the playground and write your first line. The AI mentor is ready when you are.