Microsoft does not offer a permanently free version of the full desktop app, but you can access its electrical diagramming features through these official channels:
For users who need a permanent, cost-free solution for electrical schematics, several open-source and free tools offer features similar to Visio: Compare Visio versions and features - Microsoft Support visio electrical software free download
Finding a generally involves two paths: accessing a trial of the official Microsoft Visio software or using specialized free alternatives. While Microsoft Visio is a premium tool, there are ways to test its electrical engineering features for free, along with open-source options that require no payment. Official Microsoft Visio Options Microsoft does not offer a permanently free version
You can sign up for a trial of Visio Plan 2 , which includes the desktop app and the full suite of electrical engineering templates and stencils. A lightweight version of Visio is available for
A lightweight version of Visio is available for free to Microsoft 365 business subscribers. While it supports basic diagramming, advanced electrical engineering stencils (like those for industrial control systems) typically require a Visio Plan 2 subscription.
Microsoft provides free Educational Shapes that include circuit diagram components for use with existing Visio installations. Free Electrical Design Alternatives