JavaScript Minifier & Beautifier
Minify JavaScript to reduce file size or beautify for better readability. Supports ES6+, JSX, and all modern JavaScript features. All processing happens in your browser—fast, secure, and private.
How it helps
JavaScript minification is essential for production websites. By removing comments, whitespace, and unnecessary characters, you can reduce file sizes by 30-50%, leading to faster page loads and better user experience. Smaller files mean less bandwidth usage and faster downloads, especially on mobile devices.
Beautification is equally important during development. Well-formatted code with proper indentation makes it easier to read, debug, and maintain. Whether you're working with minified third-party libraries or cleaning up your own code, the beautifier helps you understand code structure at a glance.
Features
- Minify: Remove comments, whitespace, and line breaks to reduce file size significantly.
- Beautify: Format JavaScript with proper indentation for better readability.
- ES6+ Support: Works with arrow functions, template literals, destructuring, and more.
- JSX Support: Handles React JSX syntax seamlessly.
- Syntax Validation: Check for JavaScript syntax errors before deployment.
- File Size Stats: See exactly how much space you save after minification.
- Privacy-First: All processing happens in your browser—no server uploads.
Tips
- Always minify JavaScript before deploying to production to improve load times.
- Use beautify to make third-party minified code readable for debugging.
- Keep comments in development, remove them in production for smaller file sizes.
- Validate your JavaScript after making changes to catch syntax errors early.
- Choose 2-space indentation for more compact code, 4-space for better readability.
- Combine with gzip compression on your server for maximum file size reduction.
Frequently Asked Questions
What does JavaScript minification do?
JavaScript minification removes unnecessary characters like whitespace, comments, and line breaks to reduce file size. This improves page load times and reduces bandwidth usage without changing functionality.
Does it support ES6+ syntax?
Yes! The tool fully supports modern JavaScript including arrow functions, template literals, destructuring, async/await, classes, modules, and JSX.
Is my JavaScript code sent to a server?
No. All processing happens locally in your browser. Your code never leaves your device, ensuring complete privacy and security.
What is the difference between minify and beautify?
Minify compresses code by removing whitespace and comments to reduce file size for production. Beautify formats code with proper indentation and spacing for better readability during development.
How much can I reduce file size?
Typically, JavaScript minification can reduce file size by 30-50%, depending on how much whitespace and comments your code contains. The tool shows you the exact reduction percentage after minification.