JS Minifier - JavaScript Code Minifier
Minify JavaScript to reduce file size. Remove comments, mangle variables, compress code, and optimize for production. 100% free and private.
Fast Minification
Powered by Terser, the industry-standard JavaScript minifier used by webpack and major frameworks.
100% Private
All minification happens locally in your browser. Your code never leaves your device.
Syntax Validation
Automatically detects syntax errors with clear error messages to help you debug.
How to Minify JavaScript
Paste Your JavaScript
Copy and paste your JavaScript code into the text area, or click "Load Sample Code" to try it out.
Choose Options
Select minification options: remove comments, mangle variables, compress code, or remove console.log statements.
Minify & Download
Click "Minify JavaScript" to compress your code. View compression stats, then copy or download the result.
Frequently Asked Questions
What is JavaScript minification?
JavaScript minification is the process of removing unnecessary characters from code (like whitespace, comments, and line breaks) and optimizing it to reduce file size. This improves website load times and performance.
What does 'mangle' mean in JS minification?
Mangling is the process of renaming variables and function names to shorter versions (like 'a', 'b', 'c'). This significantly reduces code size while maintaining functionality.
Will minification break my JavaScript code?
If your JavaScript code is syntactically correct, minification will preserve its functionality. However, if there are syntax errors, the minifier will show an error message to help you fix them.
Should I minify JavaScript for production?
Yes! Minifying JavaScript for production is a best practice. It reduces file size by 30-70%, improving page load times and bandwidth usage. Always keep an unminified version for development.
Can I remove console.log statements automatically?
Yes! Our JS minifier has an option to automatically remove all console.log statements from your code, which is recommended for production builds.
Is my JavaScript code safe and private?
Absolutely. All minification happens entirely in your browser. Your JavaScript code never gets uploaded to any server, ensuring complete privacy and security.