Interactive JavaScript Event Loop Visualizer • Learn async execution step-by-step →

JavaScript Event Loop Visualizer

Write your own JavaScript code and visualize how the event loop handles async operations, microtasks, and macrotasks in real-time.

script.js

💡 Quick Tips:

  • • console.log() for output
  • • setTimeout() for macrotasks
  • • Promise / async/await for microtasks
JavaScript

Ready to Visualize

Edit the code on the left and click "Visualize Code" to see the event loop in action