XML Schema validation service
https://www.softwarebytes.org/xmlvalidation22.12.2021 · Online XML Schema validator. This site offers a way to do XML Schema (XSD) validation, by uploading XML and XSD documents to the server application that works behind the UI of this site. This is probably an intutive and useful way to do XML schema validation. This web application, supports both 1.0 and 1.1 versions of the XML Schema language.
Validate XML files - XML Validation
https://www.xmlvalidation.comOr upload it: The validation check is performed against any XML schema or DTD declared inside the XML document. If neither an XML schema nor a DTD is declared, only a syntax check is performed. To validate the XML document against an external XML schema, click below.