Kafka Simulator
A visual Kafka cluster you can safely break — every significant event comes with a cause-and-effect explanation: what you changed, how Kafka responded, and why.
Sandbox — try it now
Use the scenario menu when you want structure; use the tabs when you want to experiment freely.
B1
B2CTRL
B3
ISR=3/3 minISR=2 ✓
epoch:1Cluster at a glance
Use the Cluster tab to stop or isolate brokers and watch leader election. Use Consumer to trigger a rebalance, or open the Scenarios menu for a narrated failure sequence.
Quick send
Learning Mode
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Kafka Flight Simulator
Stop a broker to trigger leader election, isolate one to see a network partition, drag a lag slider past 5s to shrink the ISR, or send a message with acks=all while ISR is degraded. Every action explains itself here.
03:53:33Cluster started. 3 brokers online.