REST APIs and Free Apps for documents & images conversion on .NET device. Convert between PDF, Microsoft Word, Excel, Visio Drawing File, PowerPoint Open XML Slide Show, PPTX, Project, HTML, email and images using our Free Apps....allows you to convert between Visio Drawing File (VSDX) & PowerPoint...to VSTX VSDX to VSDM VSDX to VSSM VSDX to VSTM VSDX to PPT VSDX...