CSS Minifier, as the name implies, is a tool that is used to minimize your CSS instructions. A couple of years ago, people could just wish that there was a tool that they could use for minimizing their CSS codes. Today, there is not just one but many tools available that you can use to minify CSS online. CSS Minifier is a magic tool that many developers use in order to reduce the size of their CSS codes and beautify CSS online. It is the best practice and an advanced tool through which developers generate a beautified version of their project and enhance the speed of their website. Eventually, merging all the CSS files of a website into a single file, speeds up the download time as well.