Minifying, like compression, is another performance optimization that can be easily carried out on page resources. However, unlike compression, where you are making a file smaller, minifying is the process of removing redundant, or unnecessary code, but still ensuring that the code functions properly. Actions like removing extra characters, spaces, etc. Minifying CSS helps to speed up the page load process, which makes for a better experience for users. There are many free tools, such as CSSNano or csso, that can help with minifying CSS. Users can simply add the CSS they want minified and the tool will automatically minify, and in some cases, also compress, the CSS for you. This helps reduce the chance of human error and minifying the CSS appropriately.
Lighthouse is an open-source tool that is used to run an audit against your web pages and provides scores and suggestions for improving page performance, accessibility, SEO, and more.
PageSpeed Insights is a tool created by Google that reports on the performance of a page on both mobile and desktop devices, and provides suggestions on how that page may be improved.