On Android and iOS, the Microsoft Office app (combining Word, Excel, and PowerPoint) is free to download and use for documents on devices with screens 10.1 inches or smaller. For basic editing on a phone or small tablet, this is entirely legitimate.
I understand you’re looking for information about Office 365 product keys, but I should clarify from the outset: there is no legitimate way to obtain a free, permanent product key for Microsoft Office 365 (now known as Microsoft 365). Microsoft 365 is a subscription-based service, meaning access is granted through a paid monthly or annual plan, not a one-time product key. Any website, generator, or tool claiming to offer “free Office 365 product keys” is almost certainly a scam, a source of malware, or offering stolen or trial keys that will be revoked. office 365 product key free
Students and teachers with a valid school email address can often get Microsoft 365 Education for free, including the desktop apps. Similarly, nonprofits may qualify for donated or heavily discounted subscriptions. Ethical and Practical Conclusion Searching for an “Office 365 product key free” is a quest for something that does not exist—at least not legitimately. The subscription model is integral to Microsoft’s business, and any “free key” is either a scam, a temporary stolen credential, or a malware trap. The risks—security breaches, legal liability, and unstable software—far outweigh any short-term savings. On Android and iOS, the Microsoft Office app