KMSOffline 2.3.8 is an offline activation tool created 2023 by Ratiborus from Russia. The tool is based on KMS and supports three main activation methods: KMS38, HWID and generic KMS. This helps meet the needs of different users with different requirements. Its actual effects have been shown to be very good through tests. KMSOffline has also been tested with many major Microsoft software products, including Windows, Server and Office.