vinodtech

MQTT Topic Explorer & Simulator

v0.1 Beta

Practical MQTT testbench for distributed IoT systems: connect, publish, subscribe, simulate devices, add network impairments, and replay sessions.

All actions are client-side unless you explicitly connect to a broker or local bridge. No server-side session storage.

Not a security tool; for testing/dev only.

Connection

Disconnected
Advanced

Topic Explorer

0 discovered topic nodes

    Graph (beta)

    Topic topology snapshot

    No topic structure yet. Subscribe or receive messages to populate the graph.

    This lightweight graph is optimized for quick topology inspection. Full graph controls are planned in roadmap.

    Message Stream

    TimeTopicPayloadBytesQoSFlagsSource

    No messages yet. Subscribe to a topic or start simulator.

    Record & Replay

    Replay flows through the same UI pipeline and is labeled REPLAY.

    0 recorded · 0 replay loaded

    Event Log

      Publish

      Subscribe

      Device Simulator

      Network Lab

      Deterministic impairment middleware for publish and simulator paths.

      Why I built this

      I needed a fast way to validate topic contracts, broker behavior, and recovery logic while building embedded/IoT systems. This tool keeps that workflow in one place so teams can reproduce issues quickly.

      Roadmap

      • Graph view improvements for large topic spaces.
      • Session compare for before/after reliability runs.
      • Reusable device profiles for simulator presets.
      • Authentication presets for multi-broker workflows.
      • PCAP import bridge for offline investigation.