Online XML Validator

Check wellformness and validness of your XML files for FREE!

This online validation service performs a strict check on whether your document is well-formed and validate it against XML Schema if any provided or specified in your file. You can use it to validate any type of XML-encoded files (as specified by W3C specs) including Google sitemaps.

Web developers should understand: the fact that XML document is wellformed doesn't imply that it's valid: you can have all opening and closing tags in place (wellformness) but have wrong tag names, tag coming in unexpected sequences etc. So you need a strict validator that is able to can check all that and make sure that you document honors the contract established by the XSD schema. However a valid document generally is already well-formed because a good validator / validity checker should reject non-wellformed document before even starting checking it validity with a Schema.