MQTTX is a cross-platform MQTT client application designed for testing, debugging, and managing MQTT brokers. It supports both MQTT v3.1.1 and v5.0, enables simultaneous management of multiple broker connections, and provides an interactive chat-style interface for publishing and subscribing with configurable quality of service, payload transformation, and topic visualization. The client can be used as a desktop application, a command-line tool, or a self-hosted web client deployable via Docker.
What sets MQTTX apart is its integration of AI-assisted workflows, allowing users to generate MQTT client code and message schemas, create test data and documentation, and diagnose connection issues directly from the interface. It also includes built-in tools for simulating custom publish/subscribe patterns and scheduled message publishing, as well as a benchmarking mode that stress-tests broker performance with concurrent connections and configurable message rates. The client supports SSL/TLS security for encrypted communication and can operate over WebSocket for browser-based access.
Additional capabilities include payload transformation through user-defined scripts or pre-built pipelines, logging of connection events and message traffic, and import/export of connection configurations and history. The broad feature set covers both everyday MQTT development and more advanced testing and automation scenarios.
