What is a VDX file?
A .VDX file is most commonly a Microsoft Visio XML Drawing. Created by Microsoft, these files store vector graphics, flowcharts, organizational charts, and technical diagrams in an XML format. Unlike the older binary .VSD format, the .VDX format is human-readable text. While diagrams are the most common use, the .VDX extension is sometimes used for ViconNet video surveillance index files, Universal Viewer settings, or legacy video files for the game The 7th Guest.
How to open VDX files?
The standard program to open a Microsoft Visio XML Drawing is Microsoft Visio. If you do not have this software, you can use compatible diagramming tools like Lucidchart or LibreOffice Draw. Because the primary format is XML, you can also open the file in code editors like Notepad++ or Visual Studio Code to view the raw data structure.
Best practices and troubleshooting
If your .VDX file fails to open in vector software, verify its origin. It might be a ViconNet surveillance index file rather than a diagram. You can verify the file contents by opening it in a text editor; a Visio diagram will display standard XML tags at the top. To avoid data corruption, always create backups before converting .VDX files to newer formats like .VSDX.
Software and tools
Several applications support .VDX files. Official support is provided by Microsoft Visio. Alternatives include OmniGraffle for macOS users, ConceptDraw DIAGRAM, and the open-source LibreOffice.
Summary
viewer.online/vdx analyzes .VDX files to identify their exact format and creator software, shows which programs can open the file, and usually previews it. Because .VDX has multiple possible meanings, we recommend using viewer.online/vdx to identify the actual format of your file. viewer.online/vdx directly opens and previews .VDX files in the browser, eliminating the need to install software or troubleshoot compatibility issues.