OPEN APPLICATION 001 · macOS

OffsetDock

A calm, local-first operations cockpit for the streams that refuse to sit still.

Download for Apple silicon View source on GitHub ↗

Version 0.1.0 · MIT licensed · unsigned development build · no telemetry

DEMO CLUSTER

TOPIC / ORDERS.V1

Messages

12 partitions3× replication0 under-replicated

{ "event": "order.accepted", "offset": 48291 }

{ "event": "order.shipped",  "offset": 48292 }

{ "event": "order.delivered","offset": 48293 }

YOUR CLUSTERS STAY YOURS

Credentials are encrypted with the macOS keychain. Kafka traffic runs in the desktop process. No account, cloud relay, analytics, or telemetry.

WHAT SHIPS IN 0.1

Everything needed for the everyday Kafka investigation loop.

Explore

Filter brokers, topics, partitions, and consumer groups from one cluster tree.

Inspect

Fetch by offset or timestamp; search keys, values, and headers; view JSON, XML, text, or hex.

Diagnose

See committed and end offsets, per-partition lag, membership, assignments, and group state.

Operate

Produce events, import message batches, add partitions, edit topic configuration, and reset offsets.

Connect safely

Use TLS, mTLS, SASL PLAIN/SCRAM, or AWS MSK IAM while credentials remain protected locally.

Practice first

Explore a built-in demo cluster before connecting to infrastructure.

SEE IT IN ACTION

A clear view from message payload to consumer lag.

Captured from the shipping macOS build using OffsetDock's private, in-memory demo cluster.

OffsetDock message browser showing Kafka records and a structured payload inspector — **01 · Inspect messages**Search records, scan offsets, and inspect structured payloads without leaving the desktop.

OffsetDock consumer group view showing partition lag — **02 · Diagnose lag**Compare committed and end offsets across every partition.

OffsetDock welcome screen with demo cluster and cluster connection actions — **03 · Explore safely**Start with realistic sample data before connecting to a broker.

DOWNLOAD & VERIFY

One transparent macOS build.

OffsetDock 0.1.0 is available for Apple-silicon Macs as a free, unsigned development release. The source, release history, and installer checksum are public.

Download DMG · 125.5 MB Read release notes ↗

Platform: macOS 13+ · Apple silicon
Package: OffsetDock-0.1.0-arm64.dmg
License: MIT · source available
Signing: Unsigned and not notarized
SHA-256: b0452e7f7c530a4882ec5fa7bdffab90293e85404f5ba8d6ab8b96c9fccc90b4

OPERATOR SAFETY

Power deserves friction.

Destructive topic actions require explicit confirmation.
Offset resets are guarded and limited to idle consumer groups.
A full demo adapter makes exploration useful without touching a real broker.
Secrets never cross into the sandboxed renderer.

NEXT ON THE DOCK

Schema Registry, Kafka Connect, ksqlDB, ACL authoring, richer health history, and explainable operational recommendations.

The first release focuses on the Kafka protocol operations we can test safely. The roadmap deliberately separates planned integrations from shipped capability.