Why Web Page Validity Is Important

December 28, 2008 by D. A. Shaver

A web page validator checks for mark up errors in a web page. Mark up is the tags that govern the appearance of a web page. These are not visible to the web page user. Validity determines the web page quality. The more errors a web page has the less predicable the appearance and usability will be. There are many browsers and when there is an error in the mark up the browser will guess what should be. This guessing is why invalid pages can still be seen on the users computer.

The W3C Validator is at http://validator.w3.org/

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