JavaScript Minifier

A JavaScript minifier removes unnecessary characters — like whitespace, comments, and redundant syntax — from JS code without changing how it executes. The result is a smaller file that downloads faster.

Yes. All processing happens entirely in your browser (client-side). Your JavaScript is never uploaded to a server, so it stays completely private and secure.

You can toggle: remove comments, collapse whitespace, remove console.log / console.* calls, remove debugger statements, shorten booleans (true → !0, false → !1), remove last semicolons, shorten undefined → void 0, and remove leading zeros (0.5 → .5).

No for well-formed code. The minifier preserves quoted strings, template literals, and regex literals. The resulting code executes identically in browsers and Node.js.

Typical savings range from 15% to 50%, depending on how verbose your original code is. The tool shows real-time byte count and percentage reduction so you can see the exact savings instantly.

Yes. Click the 'Upload .js' button to load a script directly from your computer. You can also download the minified result as a .js file.

Only if your program logic depends on console.log output. The minifier removes console.log, console.warn, console.error, and related calls. This is usually safe for production but can be disabled if you need to keep them.

Yes. The minifier preserves modern syntax like arrow functions, async/await, optional chaining, nullish coalescing, template literals, destructuring, class fields, and more.

This is a browser tool for quick, one-off minification. For production build pipelines, use dedicated tools like Terser, esbuild, or UglifyJS which integrate with bundlers like Webpack, Vite, and Rollup.