Practice Coding Smarter with an AI Mentor
CodeXGround is a free online AI coding playground for JavaScript and Python. Practice coding, run code instantly, solve AI generated coding challenges, and improve your code with AI powered reviews and suggestions.
Free • No Signup Required • AI Code Review
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.
AI Coding Challenges
Generate AI coding challenges, solve them, and get instant scores with personalized feedback.
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.
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
Practice, run, and improve your code with AI in three simple steps.
Practice
Write JavaScript or Python code or generate an AI coding challenge based on your topic and difficulty.
Run
Execute your code instantly in the browser and view the output in the built-in console.
Improve
Use AI to check issues, improve your solution, review challenge submissions, and get detailed feedback.
JavaScript & Python Playground
Write, run, and improve JavaScript or Python code with AI in one playground.
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 improve your coding skills?
Write, run, and improve JavaScript or Python code with AI. Practice with AI generated coding challenges and get instant feedback.