A CSS Minifier compresses and minifies any type of CSS code by removing white spaces, newlines, indentation, and comments. It optimises CSS and minimises file size for your webpage. 

CSS minification is the removal of any unneeded characters from CSS source code without affecting its functionality. This cuts down on the quantity of data that needs to be sent to users.

There are numerous free CSS Minifier online where you can minify any CSS code. These CSS Minifier online tools are very famous among IT Company USA.

• It has a text field labelled ‘CSS content’ where you need enter the code. It includes two buttons: one for ‘Minify’ and the other for ‘clear.’ 
• You must copy the code you want to minify and paste it into the text box before pressing the ‘Minify’ button. In a few seconds, the result of Minification is displayed just below the Minify button. 
• Copy the minified content and use it in your HTML code. Once you’ve finished your work, simply click the ‘clear’ button to remove the previous content and make room for your next script.

• Eliminates useless white spaces, indentation characters, and line breaks
• Removes the last semi-colon of a style statement as well as any extra semi-colons
• Eliminates all CSS variables that aren’t used.
• When utilising zero values, it removes the units.
• If the float value is less than one, the leading 0 is removed.
• Changes RGB colour values to a hexadecimal representation that is easier to remember.
• Removes all superfluous declarations and maintains a single charset per CSS file.