What is JavaScript Minification?
JavaScript minification is the process of removing unnecessary characters from JavaScript code without changing its functionality. This includes removing whitespace, comments, and shortening variable names. Minified JavaScript files load faster, reducing page load times and improving user experience.
How to Minify JavaScript Online
Simply paste your JavaScript code into the input area, select 'Minify' mode, and the tool will automatically compress your code. You can customize various options like removing comments, handling semicolons, and quote styles. Download the minified file or copy it directly to your clipboard.
JavaScript Beautification Features
The beautify mode formats compressed or minified JavaScript code with proper indentation and line breaks. Perfect for debugging minified code or improving code readability. Customize indent size and formatting options to match your coding standards.
Free Online Tool - No Registration Required
All processing happens entirely in your browser. Your JavaScript code is never sent to any server, ensuring complete privacy and security. Use this tool unlimited times without creating an account.
Frequently Asked Questions
How much can I reduce file size?
Typical compression ranges from 20-60% depending on code style and comments. Heavily commented code with lots of whitespace will see greater reduction. The tool shows exact compression ratios and file size savings.
Will minification break my code?
Our minifier preserves code functionality while removing only unnecessary elements. It uses Terser, a production-grade JavaScript minifier. Always test minified code before production deployment.
Can I customize minification options?
Yes! Configure comment removal, whitespace handling, semicolon management, quote preferences, and use presets for common configurations like aggressive, safe, or readable formatting.
What about source maps?
This tool focuses on basic minification and beautification. For production builds with source maps, consider using build tools like webpack, Rollup, or esbuild with proper source map configuration.
Is my JavaScript code secure?
All processing happens entirely in your browser using client-side JavaScript. No code is sent to our servers. Your JavaScript files remain completely private and secure.
Does it support ES6+ and modules?
Yes! The tool supports modern JavaScript features including ES6+, async/await, classes, modules (import/export), and more. It uses Terser with ECMAScript 2020 support.