REST APIs and Free Apps for documents & images conversion on .NET device. Convert between PDF, Microsoft Word, Excel, Visio Macro-Enabled Stencil File, Visio Drawing Template, PPTX, Project, HTML, email and images using our Free Apps....NET Convert VSSM to VSTX Convert VSSM to VSTX via Free App...between Visio Macro-Enabled Stencil File (VSSM) & Visio Drawing...