ZeroServer.tools

JavaScript Minifier

Remove comments and whitespace from JavaScript — shrink JS files for production.

JavaScript input

276 chars

Minified output

−44%

function greet(name){const message ="Hello," + name + "!"; console.log(message); return message;} function add(a,b){return a + b;} const PI =3.14159265359;

155 chars

Show size comparison

How JavaScript minification works

Minification removes single-line comments (//), block comments (/* */), redundant whitespace, and blank lines while preserving string literals and template literals intact. The result is valid JS that browsers execute identically to the original.

To also minify CSS, use the CSS Minifier. For HTML minification, try HTML Minifier. To measure code size differences, use the Text Diff tool.

Private & free — this tool runs entirely in your browser.