JS & CSS Minifier is an online JavaScript/CSS compressor that allows you to compress and minify all of your JS/CSS files by up to 80% of their original size. Copy and paste your code or you can upload multiple files and then compress. We use UglifyJS 3 and babili-standalone for all JavaScript minification and compression. This minifier removes whitespace, strips comments, combines files, and optimizes/shortens a few common programming patterns. And it comes with a huge test suite.