Any tool or website claiming to do so is either a scam, a vector for malware, or both.

I understand you're looking for information about Microsoft Office 365 activation. However, I should clarify that Microsoft Office 365 (now largely rebranded as Microsoft 365) is a subscription-based service that requires a valid license. There is no legitimate, legal way to activate the full desktop versions of Office 365 for free without a product key or subscription.

If you're a student or teacher, you may be eligible for Office 365 Education, which is free:

While Microsoft Office 365 typically requires a paid subscription, there are several legitimate ways to access and activate its features for free without a traditional product key. Modern activation is usually handled through a Microsoft account rather than a 25-character key. 1. Use Microsoft 365 for the Web (Free Forever)