A: The official Microsoft Visio Viewer (free) is an MSI installer, not portable. However, you can install it on a work PC, but you cannot run it from a USB. It only allows viewing, not editing.
For power users who need the full desktop application, Visio Plan 2 utilizes Microsoft's "Click-to-Run" technology. While it requires installation, it allows a single user to install Visio on up to five PCs simultaneously, streaming the application quickly over the cloud. Top Free and Legal Alternatives to Visio Microsoft Visio Portable Download
It eliminates the background clutter and storage footprint of a full Microsoft Office suite installation. The Hidden Dangers of Downloading Portable Visio A: The official Microsoft Visio Viewer (free) is