Any good free Sitemap Validator?

Hi,

I do SEO and one of the things is to make sure customer sitemap is valid. I found few online validators but the one I really liked is http://www.xmlcheck.com. I just want to know if anyone has used this online tool or recommends another one?
I know google does check but one of the SEO items we do is to validate sitemaps and if URLs are search engine friendly.

Thanks for any feedback.

Art

BTW, when you do SEO, you would obviously have spent some time in making your URL’s search engine friendly, isn’t it? So, why do you require validation? just create a sitemap using free tools and submit it on webmaster tools.

When you submit a xml sitemap in Google Webmaster Tools there is sitemap validator that will let you know any errors in it.

I have a e-commerce website for shop and want to whether my sitemap is valid or not?? Is there any other tool to check whether my sitemap??

See the two previous answers.