Understanding code execution, call stacks, and pointer mutations can be tricky—especially when debugging complex algorithms, recursion, or data structures like linked lists and trees.
To solve this without server latency, I built PyViz, a zero-lag, completely in-browser python code visualizer powered by WebAssembly (Pyodide).
Why PyViz?
Most online execution visualizers rely on backend servers to run Python code via isolated Docker containers. This introduces server latency, sandbox timeouts, and scalability limits.
With PyViz:
- Client-Side WebAssembly Execution: Python runs directly inside your browser tab using Pyodide.
- Step-by-Step Python Execution Debugger: Move forward and backward through line-by-line execution states.
- Python Memory & Call Stack Visualizer: Inspect active stack frames, local/global variable scopes, heap objects, and pointer references dynamically.
- LeetCode Python Visualizer Online: Perfect for testing recursion, binary tree traversals, and linked list operations when solving DSA interview problems.
How it Works Under the Hood
- Dynamic UI Rendering: The frontend parses the step events and dynamically updates the editor highlight, stack frame list, variable tables, and memory heap pointers without full page re-renders.
Try it out here: Visualize Python Execution Online on PyViz
I’d love to hear your feedback or feature suggestions! What algorithms would you like to visualize next?
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