MQTTX is a cross-platform MQTT 5.0 client toolbox that runs on desktop, command line, and WebSocket interfaces.
MQTTX addresses the need to test and debug MQTT broker connections and messaging flows. It simplifies this work through a chat-like graphical interface that makes it straightforward to create multiple simultaneous MQTT client connections and test publishing, subscription, and protocol features across MQTT/TCP, MQTT/TLS, and MQTT/WebSocket transports. The tool supports payload formatting and handles MQTT 5.0 protocol specifics.
Developers testing MQTT brokers should choose this tool if they need a visual client that works across macOS, Linux, and Windows without complex setup. It suits anyone developing or debugging IoT applications that rely on MQTT messaging. The tool is particularly well-suited for quick connection testing and exploration of broker functionality. The README positions it as complementary to EMQX brokers but does not compare it to other MQTT clients.
The project maintains active development with regular updates to its desktop and CLI interfaces. The codebase is written in TypeScript and uses Electron for cross-platform desktop delivery. Development follows a structured release process with packaged installers available for independent operating systems. The project accepts community contributions and maintains engagement channels including discussion forums and a Discord community.
