MQTT client tools are used to connect to the MQTT broker to subscribe and publish. This article evaluates the usual MQTT client tool for reference.
[MQTT X](https://mqttx.app) is a cross-platform MQTT 5.0 desktop test client provided by the world's leading open source IoT middleware provider [EMQ](https://emqx.io) , which supports macOS, Linux, Windows. The user interface of **MQTT X** simplifies the operation logic of the page with the pattern of chatting software. Users can quickly create multiple simultaneous-online MQTT clients to test the connection/publish/subscribe functions of MQTT/TCP, MQTT/TLS and other MQTT protocol features.
MQTT X is suitable for users who are building their own MQTT message server to test connections, subscribing and publishing messages, etc. When using a client, the user can be either a publisher or a subscriber.
MQTT X simplifies the operation logic of the page with the help of chatting software. The user can quickly create a connection to save and establish multiple connection clients at the same time. It is convenient for the user to quickly test the connection of MQTT/TCP、MQTT/TLS, Publish / Subscribe functions and other features .
MQTT is a lightweight publish-subscribe mode messaging protocol designed for IoT applications in low-bandwidth and unstable network environments. MQTT is based on the publish/subscribe paradigm and works on the TCP/IP protocol family. MQTT protocol is lightweight, simple, open and easy to implement， which makes it suitable for a wide range of applications.