REST APIs and Free Apps for documents & images conversion on .NET device. Convert between PDF, Microsoft Word, Excel, Visio Macro-Enabled Stencil File, Rich Text Format File, PPTX, Project, HTML, email and images using our Free Apps....allows you to convert between Visio Macro-Enabled Stencil File (VSSM)...VSSM to ODP VSSM to OTP VSSM to POTX VSSM to POT VSSM to POTM VSSM...