The closest official equivalent to a portable version is . It requires no installation and runs inside any modern web browser.
It does not modify the Windows registry or leave behind temporary files on the host computer. Microsoft Office Word Portable Download
Using unauthorized software violates Microsoft's terms of service. The closest official equivalent to a portable version is
Using cracked, modified, or repackaged versions of Microsoft Office is a direct violation of Microsoft's End-User License Agreement (EULA) and constitutes software piracy. If you are a student or employee at an institution with strict IT policies, using such software could lead to disciplinary action or, in the case of businesses, legal liability. The only legal ways to use Microsoft Word are through a paid license, a legitimate free trial, the free web version, or a provided educational or work license. The only legal ways to use Microsoft Word
These unofficial versions are typically created by reverse-engineering or modifying legitimate copies of the software. This process often breaks core functionality. You might find that complex formatting, macros, or collaboration features are buggy or non-existent. Unlike a genuine version, which is continuously updated and refined by Microsoft, these portable hacks are frozen in time and prone to crashes and data corruption.