REST APIs and Free Apps for documents & images conversion on .NET device. Convert between PDF, Microsoft Word, Excel, Visio Drawing Template, Visio Drawing File, PPTX, Project, HTML, email and images using our Free Apps....convert between Visio Drawing Template (VSTX) & Visio Drawing File...VSTX to VTX VSTX to VDX VSTX to VSSX VSTX to VSTX VSTX to VSDM VSTX...