You can download and install the standalone tool through several official and community channels. The tool is free and open-source under the MIT license. Microsoft Azure - Installation of Service Bus Explorer
The is a powerful community-driven management tool used to administer messaging entities like queues, topics, and subscriptions within Azure Service Bus. While Microsoft has integrated a native version of the Service Bus Explorer directly into the Azure portal, many developers still prefer downloading the original open-source version for its advanced features, such as mass message processing and offline capabilities. How to Download Azure Service Bus Explorer download azure service bus explorer