REST APIs and Free Apps for documents & images conversion on .NET device. Convert between PDF, Microsoft Word, Excel, Visio Stencil File, Markdown Documentation File, PPTX, Project, HTML, email and images using our Free Apps....allows you to convert between Visio Stencil File (VSS) & Markdown...VSS to RTF VSS to ODT VSS to OTT VSS to TXT VSS to MD VSS to TIFF...