While there is no "free" version of the full desktop software for regular users, there are several official ways to use and activate Microsoft Office without a paid subscription. Official Ways to Access Office for Free
: Microsoft offers free versions of Office applications (Word, Excel, PowerPoint, and more) online. These web-based versions are basic and can be used for free. You can access them by signing in with a Microsoft account.
Students and teachers with a valid school email address can often get the desktop version of Microsoft 365 Education for free. Check eligibility on the Microsoft Education One-Month Free Trial: