GroupDocs.Conversion Cloud for PHP and Free Apps have been developed to help you get started with Document Conversion REST API. It not only allows you to convert between XML Paper Specification File (XPS) & OpenDocument Presentation Template (OTP) file formats but over 153 types of documents from Microsoft Office, OpenDocument, Adobe, AutoCAD, PDF, image and many other popular categories.
Check our SDKs at GitHub if you are looking for the source code to convert XPS file format to OTP in the Cloud.
GroupDocs.Conversion Cloud App is completely free. You can convert as many XPS files to OTP as you may like. If you are a developer and want to integrate this feature in your own app, you can try GroupDocs.Conversion Low-Code APIs without any limitations.
Convert unlimited documents and images using our Free online conversion Apps