Offset Explorer (formerly Kafka Tool) is a GUI application for managing and using Apache Kafka ® clusters. It provides an intuitive UI that allows one to quickly view objects within a Kafka cluster as well as the messages stored in the topics of the cluster. It contains features geared towards both developers and administrators. Some of the key features include

• Quickly view all your Kafka clusters, including their brokers, topics and consumers
• View contents of messages in your partitions and add new messages
• View offsets of the consumers, including Apache Storm Kafka spout consumers
• Show JSON, XML and Avro messages in a pretty-printed format
• Add and drop topics plus other management features
• Save individual messages from your partitions to local hard drive
• Write your own plugins that allow you to view custom data formats
• Offset Explorer runs on Windows, Linux and Mac OS

Offset Explorer is free for personal use only. Any non-personal use, including commercial, educational and non-profit work is not permitted without purchasing a license. Non-personal use is allowed for evaluation purposes for 30 days following the download of Offset Explorer, after which you must purchase a valid license or remove the software.