Run Your Own JavaScript Through the Engine

Every other Vivix module teaches one specific concept with curated examples. Free-form mode turns the visualiser loose on any code you paste.

Paste a snippet from a tutorial, a job-interview question, a gnarly bug you're debugging — and watch the engine:

Push and pop stack frames as functions are called and return
Allocate variables and objects in heap memory, byte-by-byte
Schedule tasks on the event loop when you hit await, setTimeout, or .then()
Detect patterns — recursion, closures, async/await, hoisting — and narrate what's happening

No install, no account, no sign-up. The interpreter runs entirely in your browser.