About validating...
Validating the html and other codes in your website can be a time consuming task. Because validation simply checks the mark up language for proper syntax. There are a number of sites that offer validation tools, but the most common one resides on the W3C web site.
You simply enter the URL of the site in question or W3C allows you to physically upload a page or a site and the validation tool scans the file and informs the user of any syntax. The corrections then have to be made by the site designer.
To save you time, we gathered all important validators at one place. You can choose from nine validators. You can check links at you site as well.