While there is no permanent "free" version of the full Microsoft Visio desktop application, you can access a lightweight version of for free if you have an existing Microsoft 365 business or education subscription. For users without these plans, the only official way to download Visio for free is through a 30-day trial of the subscription-based Plan 1 or Plan 2. How to Access Visio for Free with Microsoft 365
Microsoft has integrated a "lite" web-based version of Visio into most commercial Microsoft 365 plans at no extra cost. About Visio in Microsoft 365 visio free download microsoft office