: You can view and edit files for free in any browser by uploading them to Microsoft 365 .
If you need to open an attachment on the go, these apps are lightweight and reliable.
For a traditional "install and open" experience, these third-party applications are the top-rated alternatives as of 2026. Key Feature Complete Offline Power Windows, Mac, Linux Fully open-source; opens legacy Word files. WPS Office Familiar Interface Windows, iOS, Android Closest look and feel to Microsoft Word. ONLYOFFICE Formatting Accuracy Windows, Mac, Mobile High compatibility with complex .docx files. FreeOffice Speed & Efficiency Windows, Mac, Linux Lightweight and fast on older hardware. Free Mobile Viewers for Android and iOS