What is the Microsoft Word Add-In?

Last updated: October 19, 2026

The Microsoft Word team selected GPTZero as the most reliable AI detection app after testing dozens of others, and proposed an expedited process to make GPTZero accessible to millions of Word users around the world. That is how the GPTZero Microsoft Word plugin was born.

The GPTZero add-in open in a Microsoft Word sidebar

The plugin detects AI-generated text right inside Microsoft Word. Select any passage in your document and it is copied into the GPTZero sidebar, then click Get Results. Sentences that are more likely to have been written by AI are highlighted for you.

It helps you identify when a Word doc you're reading was written in part with AI, without leaving Word or copying text into another tab.

Two things to know before you start: you need a GPTZero account to use the add-in, and a selection has to be at least 250 characters long. Creating an account is free, so you can get started without paying.

See How can I get the Microsoft Word Add-In? to install it.