REST APIs and Free Apps for documents & images conversion on .NET device. Convert between PDF, Microsoft Word, Excel, Visio Drawing Template, Rich Text Format File, PPTX, Project, HTML, email and images using our Free Apps....allows you to convert between Visio Drawing Template (VSTX) & Rich...to DOTX VSTX to RTF VSTX to ODT VSTX to OTT VSTX to TXT VSTX...