A CSS Validator is a web-based software tool that was created for use by web developers and designers. It is used to check the validity of cascading style sheets, which are also commonly known in the design industry as CSS. This tool helps developers to spot problems within their style sheets so they can be corrected to repair any errors appearing on the web pages they serve.

In addition to fixing errors, a good CSS Validator will also help developers find any typos that occur within the markup. It should also alert the designer to any instances of incorrect CSS usage. Even small mistakes can make a huge difference in the way a website appears, as CSS can be used to control many different elements of a web page. From the overall layout and structure to the font, color and multimedia objects within a web page, CSS can do it all.

It is important to make sure that the CSS you are using on your design project is written and formatted correctly. A CSS Validator makes it easy for developers to fix errors quickly and accurately. Before you launch your next web project, take the time to check your cascading style sheet files with a reputable CSS Validator.