If you need a permanently free tool for creating diagrams, these are the top-rated open-source and web-based alternatives: Visio for the web: FAQ - Microsoft Support

The best part is that you can try these tools immediately by simply clicking any of the links provided above. There is no risk and no installation required for most of them. So, whether you are mapping out a complex software architecture, sketching a simple flowchart, or collaborating with a team on a visual project, the perfect free tool is just a click away.

Sign up for the Official Microsoft 365 30-day trial . To create for free forever: Head to diagrams.net (Draw.io) .

Most operating systems cannot open .vsdx , but every device has a PDF reader.

“Full Visio 2021 Professional – 100% working free link.”