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