1 - Validator 1.1 Validator is a drag-and-drop XML validator for Mac OS X and Windows. Drag an XML file onto the Validator icon. If the file has a document type declaration, Validator reports the file as valid, not valid, or not well-formed. If the file does not have a doctype, Validator reports the file as well-formed or not well-formed. License: Freeware OS: Mac OS X 10.1 Size: 1.8 MB