Microsoft does not offer an official "portable" version of Visio. Because Visio is a complex piece of software with deep integrations into the Windows registry and system files, official versions must be installed via the Office Deployment Tool (ODT) or the Microsoft 365 portal.

Here is an analysis of the topic, including the risks, the reality of "portable" versions, and safe alternatives.

7. Recommendations

1. For IT departments: Block downloads of “portable Visio” via web filtering and application whitelisting. Deploy legitimate Visio via Company Portal or VDI.
2. For individuals: Use Draw.io portable for most diagramming needs. If Visio features are mandatory, subscribe to Microsoft 365 Visio Plan 2 and use web version.
3. For auditors: Scan for suspicious executables named “VisioPortable.exe”, “Visio_Crack.exe”, or modified VSDX launchers on endpoints.

Microsoft Visio Viewer (Free):