Visual Labs

Interactive visualizers that show you exactly what your code is doing — step by step, in real-time.

JavaScript

Event Loop Visualizer

Visualize the Call Stack, Web APIs, Microtask Queue, and Macrotask Queue in real-time.

Start Experiment

Promise Execution

See how promise chains execute, resolve, reject, and how errors propagate through catch blocks.

Start Experiment

Closure Visualizer

Understand lexical scoping and see how closures store variables in memory with live state.

Start Experiment
Git

Git Playground

Learn Git through interactive tasks. Use a simulated terminal to commit, branch, and merge while visualizing your repository graph.

Start Experiment