A VSDX file is a drawing saved in the VSDX file format introduced with Visio 2013, a program used for making drawings and technical illustrations. It stores shapes, lines, text, and other objects arranged together on a free-form canvas. VSDX files are used for saving flowcharts, process diagrams, organizational charts, and other types of drawings.
VSDX file open in LibreOffice Draw 6.2
The VSDX format replaces the older .VSD binary format and .VDX XML format used by Visio 2010 and earlier. The VSDX format uses Open Packaging Conventions (OPC), which is based on XML and uses a .ZIP container to package all the drawing contents. If you do not have a program that supports the VSDX format you can still view the contents of a VSDX file by renaming its extension to ".zip" and unzipping the file. VSDX files can be classified as "archives" or "packages." They contain "document" parts, which includes the content and metadata of the VSDX file, and "relationship" parts, which include images and text files.
Microsoft Visio is primarily used to create diagrams and store them in the VSDX file. Some other files used by Visio include the .VSDM file to store macro-enabled drawings, .VSTX files to store templates, .VSTM files to store macro-enabled templates, .VSSX files to store stencils, and .VSSM files to store macro-enabled stencils.