JavaScript Minifier
Minify your JavaScript code by removing comments and collapsing whitespace. Basic minification for smaller file sizes and faster loading.
Note: This tool performs basic minification (comment and whitespace removal). For advanced optimizations like variable renaming and dead code elimination, use a full uglifier/bundler like Terser or UglifyJS.
How to Use the JavaScript Minifier
- Paste your JavaScript code into the input textarea.
- Click Minify JavaScript to process the code.
- View the compression stats showing original size, minified size, and percentage saved.
- Click Copy to copy the minified code, or Download to save it as a .min.js file.
About JavaScript Minification
JavaScript minification is an essential step in web optimization. Modern websites rely heavily on JavaScript, and unminified code contains comments, whitespace, and formatting that are helpful for developers but unnecessary for browsers. By removing these non-functional characters, minification reduces the amount of data that needs to be transferred over the network.
This tool performs basic minification by stripping single-line comments (//), multi-line comments (/* */), and collapsing unnecessary whitespace. It preserves strings and regular expressions to avoid breaking your code. For production deployments requiring advanced optimizations such as variable shortening, tree shaking, and dead code elimination, consider using full-featured tools like Terser, UglifyJS, or webpack with the appropriate plugins.
Frequently Asked Questions
JavaScript minification removes unnecessary characters from JS code such as comments, whitespace, and newlines without changing the code's functionality. This reduces file size and improves page load times.
Minification removes comments and whitespace. Uglification goes further by renaming variables to shorter names, removing dead code, and performing other advanced optimizations. This tool provides basic minification (comment and whitespace removal).
No. Properly minified JavaScript functions identically to the original. Only non-functional characters like comments and extra whitespace are removed. Always test your minified code to ensure everything works as expected.
Yes. Minifying JavaScript is a standard best practice for production websites. It reduces file sizes, decreases download times, and improves page performance metrics. Keep the original source for development and use the minified version in production.