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JavaScript Minifier

Drag & Drop or Paste your JavaScript to compress and reduce file size

Input JavaScript

Drag & Drop your JavaScript file here

OR

Click to browse files

Minified Output

0
Original Size (bytes)
0
Minified Size (bytes)
0%
Size Reduced

What is JavaScript Minifier?

Minify JavaScript code to dramatically reduce file size and improve website performance with our free JS Minifier. Removes comments, whitespace, shortens variable names, and optimizes code structures. Achieve 30-70% file size reduction while maintaining identical functionality. Essential for production web deployment.

How to Use JavaScript Minifier

1

Paste your JavaScript code in the input area.

2

Click 'Minify' to compress the JavaScript.

3

View the minified output and compression statistics.

4

Copy or download the minified JS file.

Key Features

Removes comments, whitespace, and line breaks
Shows compression ratio and bytes saved
Handles ES6+ modern JavaScript syntax
Preserves code functionality
Error detection for invalid syntax

Frequently Asked Questions

Does JS minification change code behavior?

No, proper minification only removes unnecessary characters and shortens internal variable names. The code executes identically to the original. Our tool uses safe transformations only.

How much space can JS minification save?

Typically 30-70% depending on the code style. Files with many comments and verbose variable names see the largest reductions. Combined with gzip, total savings can exceed 80%.

Should I use source maps with minified code?

Yes, source maps allow you to debug the original readable code in browser DevTools while serving the minified version to users. Most build tools generate source maps automatically.