Selective minification works by identifying and minifying non-critical parts of the email, such as whitespace, comments, and unnecessary characters in the HTML and CSS code. Tools and techniques used for selective minification include:
HTML Minifiers: Compress HTML code by removing redundant spaces, lines, and comments. CSS Minifiers: Optimize CSS by eliminating unnecessary whitespace and comments. JavaScript Minifiers: Reduce the size of JavaScript files by minifying code and removing comments.