JavaScript code obfuscator based on stack virtual machine virtualization. Transforms your JavaScript code into a virtualized stack-based representation, making it harder to understand while maintaining functionality.

• Converts JavaScript code to stack-based virtual machine instructions
• Preserves original program functionality
• Lightweight obfuscation solution
• Focus on core JavaScript features

git clone https://github.com/x676w/StackVM

cd StackVM

npm install

Edit obfuscate.ts

import obfuscate from "./src/index.js";

obfuscate(`
  console.log('Hello, World!');
`).then((interpreter) => {
  console.log(interpreter);
});

npm start

Output

!function(n){let r=0;const o=[80,"console",69,"log",69,"Hello, World!",74,1],e=[];function c(){return o[r++]}function t(){if(!(r>=o.length))return function(){switch(c()){case 74:for(var r=c(),o=new Array(r),t=0;t<r;t++)o[t]=e.pop();var a=e.pop(),f=e.pop();e.push(f[a].apply(f,o));break;case 80:e.push(n[c()]);break;case 69:e.push(c())}}(),!0}for(;t(););}(this);

• Arithmetic ✅
• Unary Expressions ✅
• Logical Expressions ❌​
• Call Expressions ✅
• Arrays ✅
• Objects ❌​
• Variables ✅
• Functions ❌​
• Loops ❌​
• Conditionals ❌​

StackVM transforms your JavaScript code into a series of stack operations executed by a virtual machine. The original code structure is replaced with:

A stack-based instruction set

A virtual machine interpreter

Obfuscated data storage

This approach makes reverse engineering more difficult while keeping the runtime behavior identical.

Currently only supports a subset of JavaScript features

Not a strong obfuscation solution for security-critical applications

May impact performance for complex operations