Visio Diagram Java API can load and save variety of formats including VSDX, VDX, VSD, VTX, VSSX, VSDM, VSTM, Pdf, XPS, SVG, EMF, JPEG, PNG, BMP, TIFF and HTML....(Vector Graphics File Format) VSX Visio Stencil XML file type VTX...and Mermaid sequence diagram PDF PDF (Portable Document Format)...