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Kafka Is Fun

Interactive Kafka playground — free, in your browser

Master Kafka by breaking it.

Watch a live cluster think. Crash its brokers. Heal it. From your first partition to production architecture — one guided journey, zero setup.

Break your first cluster Start learning
learning modules
8learning modules
interview questions
220+interview questions
installs required
0installs required

Where do you want to start?

Four ways in, one platform. Every path connects to the others.

LearnEight structured modules from fundamentals to internals, plus the full Spring Boot path — every lesson with analogies, real configs and a knowledge check.
Practice220+ interview questions with keyword-based answer evaluation, and hands-on labs that run against the live simulator.
SimulateA visual Kafka cluster you can break: crash brokers, partition the network, poison messages — then watch it heal and understand why.
DesignThe architecture planner: size partitions, brokers, storage and network for your real workload — with the reasoning shown.
Search everythingLessons, scenarios, questions, labs, failures — one search across it all.

Why it finally clicks here

See it, don't memorise it

Leader election, ISR shrink, rebalances — every cause paired with its visible effect, live on screen.

One path, not eight tabs

Understand → observe → experiment → implement → diagnose → design. Each section picks up where the last one ends.

Production-grade, zero setup

Real spring-kafka recipes, failure drills and sizing math — all in your browser. Nothing to install, ever.

Break it. Watch it heal. Master it.

The best Kafka engineers learned from incidents. Here, you get the incidents without the pager.

Open the simulator