Interactive Code Playground
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About the Code Playground
Code Visualizer's interactive playground lets you write, run, and visualize code execution in real-time. Paste any JavaScript, Python, C++, or Java snippet and watch as the call stack grows, variables change, and memory is allocated — step by step. Set breakpoints, step over function calls, and inspect the full program state at any point. Whether you're studying Big O notation, debugging a tricky algorithm, or learning through visual learning, this code debugger makes complex execution flows easy to understand. Perfect for coding interviews, CS courses, and everyday development.