JavaScript Minifier — Free Online Tool
Minify JavaScript code online for free. Compress JS files by removing whitespace and comments. Reduce load time and improve Core Web Vitals scores.
About JavaScript Minifier
JavaScript minification compresses your JS code by removing whitespace, comments, shortening variable names, and removing dead code. This reduces file size, decreases bandwidth usage, and speeds up page load times — directly improving your website's performance scores. Our JS minifier handles modern ES6+ syntax including arrow functions, template literals, destructuring, and modules. Paste your JavaScript code, click minify, and get a production-ready compressed version instantly.
Frequently Asked Questions
Does minified JavaScript work the same as the original?
Yes — minification only removes whitespace and comments. The code logic is unchanged.
Does it support modern ES6+ JavaScript?
Yes — arrow functions, classes, template literals, async/await, and modules are all supported.
How much can JS be compressed?
Typically 30-60% reduction.
Should I keep the original file?
Yes — always keep your original source code. Use the minified version for production only.
Can it minify React JSX or TypeScript?
Raw JSX and TypeScript need to be compiled first. Minify the compiled JavaScript output.