According to wikipedia, “Cascading Style Sheets (CSS) is a style sheet language used to describe the presentation semantics (the look and formatting) of a document written in a markup language”.
So from it’s meaning it is language that format a webpages that written in html or xhmtl. As the year past many features added in CSS that helps web designer and developer in developing a functional and good semantics of design. But as the technology become more broad there are browsers that is not compatible to CSS3 which has more features than a normal CSS. That’s why some of designers and developers does not grasp the CSS3 because of lack of compatibility for some browsers.
Don’t worry i collected from the internet the tools that might help you to validate your CSS3 if it is cross browser compatible. So here are the list of Validation Tool for Cross-Browser Compatibility with CSS3. I hope it helps you! Share it Guys!