This is the easiest way to get the plugin for modern versions of Notepad++ (v7.6 and above). Unable to install Compare Plugin - Notepad++ Community
To download and install the Compare plugin for Notepad++, you can use the built-in for an automatic setup or download the files manually from GitHub if your system is offline or restricted . Method 1: Automatic Installation (Recommended) how do i download compare plugin for notepad++