Microsoft offers a free trial version of Office 365 that you can use for a limited time. This method doesn't require a product key, and you can access all the features of Office 365 during the trial period.
There are several third-party tools available that claim to activate Microsoft Office 365 for free without a product key. One popular tool is the "Microsoft Office 365 Activator" tool. However, be cautious when using these tools, as they may not work as advertised and could potentially harm your computer. Microsoft offers a free trial version of Office