XML Sitemap checker uses sitemap files such as sitemap.xml, sitemap.xml.gz or sitemapindex.xml to check a website. It is a way for webmasters to tell search engines about available sites for crawling. A sitemap is an XML file that shows URLs of a site with extra metadata about them.
Use the sitemap validator tool to ensure that your sitemap is working correctly and can be read by search engine crawlers. You can either enter a URL of your sitemap or copy a sitemap document into the box to run the tool.