JavaScript Minifier - Compress JS Code Online Free

Minify JavaScript to reduce file size. Remove whitespace, comments, shorten names. Optimize for production. Free, private, works offline.

JavaScript Input

0 bytes

Minified JavaScript

0 bytes

Copied!

Frequently Asked Questions

It removes whitespace, comments, and optionally shortens variable names to reduce file size while preserving functionality.

No. Minification preserves code functionality. However, always test minified code before deploying to production.

Typically 30-60% reduction depending on coding style, comments, and whitespace in the original code.

Yes. All minification happens in your browser. No code is sent to any server.

Yes. Minified JavaScript loads faster, reducing page load time and bandwidth usage for your users.

Minification removes whitespace/comments. Uglification also renames variables (a, b, c) and applies advanced optimizations.

By default no, but you can configure minifiers to remove console statements for production builds.

Yes. Modern minifiers support ES6+ syntax including arrow functions, async/await, destructuring, and modules.

This tool doesn't generate sourcemaps. For production with debugging support, use build tools that create sourcemap files.

Yes. Minified code is hard to debug. Use sourcemaps in production or un-minified code for development/testing.