The Kafka Retention Calculator is a free, open-source web application designed to help Kafka administrators calculate optimal retention settings for their topics. This tool is provided as-is without any warranties.

This application runs entirely in your browser. No data is sent to external servers or stored anywhere. All calculations are performed locally on your device.

Released under the MIT License. You are free to use, modify, and distribute this software in accordance with the license terms.

The information provided by this calculator is for educational and planning purposes only. Results may not be optimal for all Kafka configurations. Always test retention settings in a non-production environment before applying to production systems.