REST APIs and Free Apps for documents & images conversion on .NET device. Convert between PDF, Microsoft Word, Excel, Visio Macro-Enabled Stencil File, Tagged Image File Format, PPTX, Project, HTML, email and images using our Free Apps....allows you to convert between Visio Macro-Enabled Stencil File (VSSM)...to PDF VSSM to EPUB VSSM to XPS VSSM to TEX VSSM to DOC VSSM...