REST APIs and Free Apps for documents & images conversion on .NET device. Convert between PDF, Microsoft Word, Excel, Visio Macro-Enabled Stencil File, WebP Image, PPTX, Project, HTML, email and images using our Free Apps....allows you to convert between Visio Macro-Enabled Stencil File (VSSM)...to JPEG VSSM to PNG VSSM to GIF VSSM to BMP VSSM to ICO VSSM...