JS Minifier

Minify JavaScript code to reduce file size

Original Size

// Utility library — helper functions
(function () {
  "use strict";

/**
   * Debounce a function call.
   * @param {Function} fn - The function to debounce
   * @param {number} delay - Delay in milliseconds
   */
  function debounce(fn, delay) {
    let timer = null;
    return function (...args) {
      clearTimeout(timer);
      timer = setTimeout(() => {
        fn.apply(this, args);
      }, delay);
    };
  }

// Format a number with commas
  function formatNumber(num) {
    return num.toString().replace(
      /\B(?=(\d{3})+(?!\d))/g,
      ","
    );
  }

// Deep clone an object
  function deepClone(obj) {
    if (obj === null || typeof obj !== "object") {
      return obj;
    }
    const copy = Array.isArray(obj) ? [] : {};
    for (const key in obj) {
      if (Object.prototype.hasOwnProperty.call(obj, key)) {
        copy[key] = deepClone(obj[key]);
      }
    }
    return copy;
  }

console.log("Utilities loaded");

window.Utils = {
    debounce: debounce,
    formatNumber: formatNumber,
    deepClone: deepClone,
  };
})();

Settings

Mangle VariablesCompressRemove console.log

What is JS Minifier?

JS Minifier compresses JavaScript code by removing whitespace, comments, and shortening variable names using the Terser engine. This reduces file size for faster page loads and lower bandwidth costs while preserving the code's functionality.

How to use

Step 1 — Paste your JavaScript code into the input editor, or upload a .js file directly.
Step 2 — Configure minification options: toggle mangling (variable name shortening), compression level, and whether to remove console.log statements.
Step 3 — Click Minify to process the code. View the size reduction percentage and download the minified file, or copy the output to clipboard.

Result

You have a 45KB utility library with extensive comments and long variable names. Paste it in, enable mangling and compression, and get a 12KB output — a 73% reduction ready for production deployment.

JS Minifier

Original Size

Settings

What is JS Minifier?

How to use

Result

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