A CSS Minifier is a tool or software that reduces the size of Cascading Style Sheets (CSS) files by removing unnecessary characters, such as white spaces, comments, and line breaks, while also simplifying or shortening the code without affecting its function or appearance. The purpose of CSS minification is to optimize web performance by minimizing the amount of data that needs to be transferred when loading a webpage.

Here’s what a CSS minifier typically does:

• Remove White Spaces: This includes spaces, tabs, and line breaks that don’t impact the style’s functionality.
• Remove Comments: Comments in CSS are useful during development but unnecessary in a production environment.
• Shorten Code: This involves replacing long variable names or reducing redundant code to make the file more compact.

CSS minifiers are commonly used in web development and are often integrated into build processes to ensure that production websites load quickly and efficiently, improving the user experience and reducing server load.