REST APIs and Free Apps for documents & images conversion on .NET device. Convert between PDF, Microsoft Word, Excel, Visio Macro-Enabled Stencil File, Plain Text File, PPTX, Project, HTML, email and images using our Free Apps....NET Convert VSSM to TXT Convert VSSM to TXT via Free App or .NET...allows you to convert between Visio Macro-Enabled Stencil File (VSSM)...