The Check CSS tool allows you specify a valid URI (URL) address (typically a Web Page) for which it check for compliance against the
Cascading Style Sheets (CSS) recommendations.
It checks the Cascading Style Sheets you use within the page does no matter if the style is specified in an external file,
in the heading part of your web page or inline style in the markups you use.
It validates all and displays a valid CSS composed by the CSS in the style files you reference in the link meta-tag's and the CSS you define using the style tag.
Before checking CSS you must check the validity of your markup code. You can use the W3C Check Markup option in the Webmaster Tools page to do that.
The validator can gives you three types of messages:
Congratulations, when what you submit validates;
Error messages, that must be fixed even the output changes;
Warning messages, that can be analyzed and fixed or ignored.
Choose the level of warnings to be signaled to you.
Select to check agaist an implementation on a particular platform (default profile is CSS level 2).
Select the media used to present your page with this CSS. It check against an implementation on a particular media: screen, paper, etc (default all media).
Choose the language in which will be prepared and shown the validation report.
Since you share this tool with others please delay your calls to at
least 1 second between two successive calls. (If you see in the right of Timer a *Ready* message you can proceed.)
*)This page passes Web Content Accessibility Guideline 1.0 (WCAG 1.0 Priority 1,2,3) Automatic Validation for all listed browsers and versions.
