Web Tools: batch / bulk HTML validation

A service which allows you to validate the HTML of your entire website with just one click of a mouse!

"Announcing the alpha release of a service that does bulk/batch HTML
validation, link checking and more. During alpha testing, the service is
free!

Anyone interested in whole-site validation should check out http://www.NikitaTheSpider.com/ where you can learn more about the service and have your site crawled."