REST APIs and Free Apps for documents & images conversion on .NET device. Convert between PDF, Microsoft Word, Excel, Visio Drawing File, Visio Stencil File, PptX, Project, HTML, email and images using our Free Apps....convert between Visio Drawing File (VSDX) & Visio Stencil File (VSSX)...to VSSM VSDX to VSTM VSDX to PPT VSDX to PPS VSDX to PPTX VSDX...