Free JavaScript Minifier Online — Compress JS Code

Remove // single-line comments Remove /* multi-line comments */ Collapse whitespace & newlines Remove console.log() calls

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⚠️ This is a basic whitespace/comment minifier. For production, use terser, uglify-js or esbuild for full variable renaming and tree-shaking.

About This Tool

The free JavaScript minifier reduces JS file size by removing comments, collapsing whitespace, and shortening variable names. Smaller JS files parse and execute faster, improving Time to Interactive and JavaScript execution scores in Google Lighthouse.

Common Use Cases

Minifying scripts before production deployment
Reducing JavaScript bundle size
Improving Core Web Vitals performance
Optimizing legacy jQuery scripts
Compressing inline JavaScript

Frequently Asked Questions

Can I reverse minified JavaScript?

Not perfectly. Variable names and comments removed during minification cannot be reliably recovered.

Will minification break my JavaScript?

This minifier uses conservative transformation — removing comments and whitespace only. Always test minified output before deploying.

What is the difference between minification and obfuscation?

Minification reduces file size by removing whitespace. Obfuscation renames variables to meaningless names. This tool performs minification only.