JS Minifier
Reduce JavaScript file sizes by stripping whitespace, line breaks, and comments — making your scripts load faster in browsers. JavaScript is often the largest and most performance-critical asset on a webpage. Minifying JS reduces the amount of data browsers must download and parse, directly improving page load times and Google PageSpeed Insights scores. This free JS minifier handles vanilla JavaScript, jQuery code, module exports, and any other JS that does not rely on runtime formatting. Perfect for developers preparing scripts for production, optimizing third-party scripts, or benchmarking code size before and after optimization.
JavaScript Minifier
Remove comments and whitespace from JavaScript code.
How to Use JS Minifier
- 1Paste your JavaScript code into the input area
- 2Click "Minify JS" to strip whitespace and comments
- 3Review the minified output and size reduction percentage
- 4Click "Copy" to copy the minified JavaScript
- 5Use the output in your production files or <script> tags
About JS Minifier
Reduce JavaScript file sizes by stripping whitespace, line breaks, and comments — making your scripts load faster in browsers. JavaScript is often the largest and most performance-critical asset on a webpage. Minifying JS reduces the amount of data browsers must download and parse, directly improving page load times and Google PageSpeed Insights scores. This free JS minifier handles vanilla JavaScript, jQuery code, module exports, and any other JS that does not rely on runtime formatting. Perfect for developers preparing scripts for production, optimizing third-party scripts, or benchmarking code size before and after optimization.
Your Privacy is Protected
JS Minifier runs entirely in your browser. Your files and data are never uploaded to any server, never stored, and never shared. Everything happens locally on your device using secure browser APIs.
Frequently Asked Questions
Is minified JavaScript still executable?
Yes. Minification only removes whitespace and comments — it does not alter any logic, variable names, or function behavior. The output runs identically to the original code.
Does JS minification obfuscate my code?
Basic minification removes formatting but does not obfuscate variable names. For code obfuscation (protecting intellectual property), you would need a dedicated obfuscator tool.
Can I minify ES6+ and modern JavaScript?
Yes. Our minifier works with modern JavaScript syntax including arrow functions, template literals, destructuring, async/await, and ES modules.
What is the difference between minification and uglification?
Minification removes whitespace and comments. Uglification goes further by also renaming variables to shorter names. For maximum size reduction, tools like Terser or UglifyJS perform both operations in automated build pipelines.
Why Use This Tool?
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