What is a JavaScript Minifier?
A JavaScript Minifier is a tool that compresses JavaScript code by removing unnecessary characters like whitespace, comments, and line breaks without changing functionality. Minified JavaScript files are significantly smaller, leading to faster page load times and improved website performance. Our free online JS minifier also includes a beautify feature to format JavaScript with proper indentation for better readability during development.
Why Minify JavaScript?
Minifying JavaScript is essential for web performance optimization. Smaller JS files mean faster downloads, reduced bandwidth usage, and improved page load times. This is especially important for mobile users and users with slower internet connections. Minified JavaScript reduces server load and improves user experience. For production websites, minification is a standard best practice that can significantly improve Core Web Vitals scores.
Key Features
- Minify JavaScript: Remove whitespace and comments to reduce file size
- Beautify JavaScript: Format JS with proper indentation
- Instant Results: Process JavaScript in real-time
- Copy Output: Easily copy minified JavaScript
- Secure & Private: All processing in browser
- Free to Use: No registration required
How to Use
- Paste your JavaScript code into the input field
- Click "Minify JS" to compress the code
- Click "Beautify JS" to format with indentation
- Copy the output using "Copy Output" button
Frequently Asked Questions
Is this JavaScript minifier free?
Yes, completely free with no limitations or registration required.
Is my JavaScript code stored?
No, all processing happens in your browser. Your code is never sent to our servers.
How much smaller will my JS be?
Typically 30-50% smaller depending on formatting and comments in original code.
Can I unminify JavaScript?
Yes, use the "Beautify JS" button to format minified JavaScript with proper indentation.
Does minifying affect JavaScript functionality?
No, minification only removes unnecessary characters. The JavaScript works exactly the same.