Create a Google Sitemap online

simple visite http://www.xml-sitemaps.com ，then input your website url，its will create a sitemap.xml file for your site. download the sitemap.xml file ,upload it to your website folder,and

login the Google Webmaster account ,submit the sitemap.xml.

just easy to use. but for free it can make 500 url of the sitemap.xml file.