Visio 2013 Portable !!better!! Direct

A free Microsoft tool that lets you view and print Visio diagrams without a full Visio installation. Available for Windows desktop, it's the safest way to view .vsdx files on computers without Visio.

: This is a free tool that allows you to view, pan, and zoom in on Visio drawings (.vsdx, .vsd, etc.) within a web browser, even if you don't have the full program installed. You can download it from the Official Microsoft Download Center Mobile Apps : Viewers are available for iPhone/iPad for viewing diagrams stored in on the go. Microsoft Support Key Details for Visio 2013 Visio help & learning - Microsoft Support visio 2013 portable

Draw.io is completely free, open-source, and arguably the best alternative to Visio. The developers officially distribute a portable version for Windows. 100% safe, verified, and open-source. A free Microsoft tool that lets you view