JavaScript Minifier

Minify JavaScript to reduce file size or beautify minified JS for readability. Remove comments, whitespace, and compress code instantly.

0 / 500,000
Result
Enter JavaScript to minify or beautify
Processes up to 500,000 characters. Basic minification removes comments and whitespace. All processing happens in your browser — your code never leaves your device.

How to Use This Tool

  1. 1

    Paste your JavaScript

    Paste your JavaScript code into the input area, or click Load sample to try with example code.

  2. 2

    Choose mode

    Select Minify to compress JS by removing comments and whitespace, or Beautify to format it with proper indentation.

  3. 3

    Review the stats

    See the original size, output size, bytes saved, and percentage reduction at a glance.

  4. 4

    Copy the result

    Click Copy to get the processed JavaScript. Use minified JS in production for faster page loads.

Frequently Asked Questions

What does JavaScript minification do?
JavaScript minification removes unnecessary characters like comments, whitespace, and newlines — without changing functionality. This reduces file size for faster page loads.
Will minification break my code?
Basic minification (comment and whitespace removal) is safe. However, for production use, consider dedicated tools like Terser or UglifyJS that also handle variable renaming safely.
What does the Beautify mode do?
Beautify takes minified or messy JavaScript and reformats it with proper indentation and line breaks — making it easy to read and debug.
Is my code safe?
Yes. All processing happens entirely in your browser. Your code never leaves your device or gets sent to any server.