Numbers to strings

Option: transforms.numbersToStrings

What it changes

Rewrites numeric literals as equivalent string-coercion expressions.

var x = arr[42] + 0.5 * 1e3;
var y = -5 * ~3;

var x = arr[+"42"] + +"0.5" * +"1000";
var y = -"5" * ~"3";

Run this transform by setting transforms.numbersToStrings to true:

obfuscate.mjs

const output = obfuscate(source, {
  transforms: {
    numbersToStrings: true,
  },
})

Open the TypeScript implementation on GitHub.

Review behavior checks and cases this transform leaves alone.

Last modified on August 26, 2026