mqttfx ☆
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Description:
IoT route testing tool
Type: Cask  |  Latest Version: 5.12.0@0  |  Tracked Since: Dec 18, 2025
Links: Homepage  |  formulae.brew.sh
Category: Developer tools
Tags: mqtt iot testing debugging networking
Install: brew install --cask mqttfx
About:
MQTT.fx is a comprehensive MQTT client designed for IoT developers and testers to simulate and debug MQTT-based communication. It provides a user-friendly GUI to connect to brokers, publish messages, and subscribe to topics for route testing. The tool is invaluable for validating IoT device connectivity and message flows in development environments.
Key Features:
  • GUI-based MQTT client with broker connection management
  • Topic subscription and message publishing capabilities
  • Scripting support for automated testing scenarios
  • Payload formatting and syntax highlighting
Use Cases:
  • Testing IoT device connectivity and message routing
  • Debugging MQTT broker configurations and topic hierarchies
  • Simulating publisher/subscriber behavior during development
Alternatives:
  • mosquitto – Command-line MQTT broker and client tools, more lightweight but lacks GUI
  • MQTT Explorer – Similar GUI client with focus on topic visualization and exploration
Version History
Detected Version Rev Change Commit
Feb 6, 2026 4:19pm 5.12.0 0 VERSION_BUMP 9a67a659
Dec 18, 2025 9:25pm 5.10.1 0 VERSION_BUMP c1ac1a6c
Aug 5, 2025 2:21pm 5.9.0 0 VERSION_BUMP 6941a4c7
Jul 31, 2024 8:22pm 5.8.0 0 VERSION_BUMP f0ca772c
Jul 30, 2024 12:58pm 5.7.2 0 VERSION_BUMP 9d0aa5ef
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