New: 43 DSA patterns with code templates

Learn hard concepts by seeing them move

Open-source interactive visualizations for algorithms, mathematics, physics and machine learning. Step through every idea instead of memorizing it.

Pick a subject

Start with whatever you're studying right now.

Notes, theory, diagrams and ready-to-use Python code templates for every common coding interview pattern.

Watch sorting, searching, trees and graphs run step by step.

Calculus, linear algebra, geometry, statistics and more you can play with.

Simulate mechanics, oscillations, waves, thermodynamics and modern physics.

See how neural networks, transformers, RL agents and classic ML really work.

Built for the moment a concept finally clicks.

Change inputs, step through each operation and watch state update in real time.

Every visualizer pairs the animation with the explanation, complexity and code.

Built in the open. Suggest topics, report issues or contribute a visualizer on GitHub.

“Imagination is more important than knowledge.”

Albert Einstein