Developer Tools
JavaScript Minifier
FreeNo SignupPrivate — runs in your browser
Minify JavaScript code online for free. Remove whitespace, comments, and shorten variable names to optimize your scripts for production. No signup required.
What is JavaScript Minifier?
Reducing JavaScript file size is crucial for web performance. Our free JavaScript Minifier removes unnecessary whitespace, comments, and formatting from your code while preserving complete functionality. Optimize your scripts for production to improve load times and user experience.
How to Use JavaScript Minifier
- 1Paste your JavaScript code
- 2Choose minification level
- 3Click Minify to process
- 4Copy the optimized output
Key Features & Benefits
Removes whitespace and comments safely
Supports ES6+ modern JavaScript
Shows compression ratio and size savings
Fast, browser-based processing
Frequently Asked Questions
How much smaller will my JavaScript be?
Typically 20-50% smaller depending on your code style. Well-commented code with long variable names sees the biggest reductions.
Does it handle ES6+ syntax?
Yes, the minifier supports modern JavaScript including arrow functions, template literals, destructuring, and modules.
Can it break my code?
The basic minification (whitespace and comment removal) is completely safe. Advanced options like variable shortening should be tested.