Kafka Flow: an interactive Apache Kafka visualization

Follow records from a producer request through partitioning, leader append, ISR replication, high-watermark visibility, consumer groups, and Kafka share groups.

Explore Kafka protocol behavior

• Compare Acks 0, 1, and All with live producer requests.
• Pause follower fetching to see replica lag, ISR changes, and blocked commits.
• Compare partition ownership in consumer groups and share groups.
• Step backward and forward through deterministic simulation ticks.

Read the complete Kafka concepts guide or open the machine-readable version.