Below you will find the download pages for Threema for all platforms.
Microsoft offers a free Visio Viewer that runs without a full Visio installation. It allows you to open, view, and print .vsdx and .vsd files. You cannot edit or create diagrams, but for quick reviews, it’s perfect.
Pros: 100% legal, no malware risk, no license key required.
Cons: View-only, no editing, no diagram creation.
These run truly from a USB drive and handle 80% of Visio’s use cases:
No legitimate "Microsoft Visio Portable" version exists from Microsoft. Search results claiming to offer portable Visio are unauthorized cracks, repacks, or trial modifications. Using them exposes organizations and individuals to malware, data loss, legal liability, and non-compliance with software licensing. Legitimate remote/portable-like access is possible only via licensed Microsoft 365 web access or virtual desktop infrastructure (VDI).
Visio Professional is regularly updated to patch security vulnerabilities. A cracked portable version is frozen—you will miss critical fixes for remote code execution exploits (like CVE-2023-29007).
