What is JS Minify?
A JavaScript Minifier is an essential tool for modern web development that compresses JavaScript source code. It removes unnecessary characters like whitespace, newlines, comments, and block delimiters without altering the code's functionality. Advanced minification can also shorten variable names and simplify logic (a process often called uglification or obfuscation) to further reduce file size. Smaller JavaScript bundles download faster, parse quicker, and execute sooner, directly improving your website's interactivity and Time to Interactive (TTI) metrics. This tool runs entirely in your browser, so you can safely minify proprietary algorithms or business logic without uploading your code to a third-party server.
Input Formats
- Raw JavaScript (ES5, ES6+)
- jQuery plugins
- React/Vue components (compiled)
Output Results
- Minified JS string
- Reduced file size
- Copy-ready code
Key Features
Who is this for?
Production Deployment
Developers compressing their main.js bundle before deploying to production to ensure fast load times.
Widget Development
Creators of embeddable widgets (chat bots, analytics) minifying their script tags to minimize impact on host sites.
Code Obfuscation
Developers wanting to make their client-side logic harder for competitors to read or copy.
How to Use
Paste your JavaScript code into the input area.
Click 'Minify' to compress the code.
Use 'Beautify' to format it back to a readable state.
Copy the result to use in your project.
Examples
Input
function add(a, b) {
// Returns the sum
return a + b;
}Output
function add(a,b){return a+b}Common Errors
- Missing semicolons (ASI issues)
- Syntax errors in ES6+ code
- Unclosed strings or brackets
Code Examples
Node.js (Terser)
const Terser = require('terser');
const code = 'function add(first, second) { return first + second; }';
const result = await Terser.minify(code);
console.log(result.code);