REST APIs and Free Apps for documents & images conversion on .NET device. Convert between PDF, Microsoft Word, Excel, Visio Stencil File, Rich Text Format File, PPTX, Project, HTML, email and images using our Free Apps....allows you to convert between Visio Stencil File (VSS) & Rich Text...VSS to POTX VSS to POT VSS to POTM VSS to PPTM VSS to PPSM VSS...