Paste your JavaScript below and get a minified version instantly. Whitespace, comments, and dead code are removed client-side — your code never leaves your browser.
JavaScript minification is the process of removing all unnecessary characters from source code — including whitespace, newlines, comments, and block delimiters — without changing its functionality. The result is a smaller file that browsers download and parse faster, directly improving page load times and Core Web Vitals scores.
Modern minifiers also perform more advanced transformations: shortening local variable and function names, eliminating dead code, and collapsing simple expressions. A well-minified JS bundle can be 30–80% smaller than the original source.
.min.js
//) and block (/* */) comments
Minified code is intentionally hard to read — that's part of the point. For debugging, always keep your original source files and use source maps to map minified line positions back to the originals. Most modern bundlers (webpack, Rollup, Vite) generate source maps automatically.
For production deployments, the recommended workflow is: develop with readable source → bundle with your build tool → minify and optionally gzip the output → serve the minified version. This tool is ideal for quick one-off tasks or for projects without a formal build pipeline.