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MQTT clients, libraries and tools

A curated list of tools to test your broker, debug messages and build your devices and applications.

Apps and desktop clients

MQTT One for Android

Our official app to connect to your broker, publish and subscribe from your phone.

  • Official
  • Android
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MQTTX

A modern cross-platform MQTT client with desktop, web and command-line versions.

  • Windows
  • macOS
  • Linux
  • Web
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MQTT Explorer

Visualizes your topic tree and shows message history — great for debugging.

  • Windows
  • macOS
  • Linux
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MyMQTT

A simple MQTT client for Android devices.

  • Android
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MQTTool

An MQTT client for iPhone and iPad.

  • iOS
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Command line and automation

Mosquitto clients

The classic mosquitto_pub and mosquitto_sub command-line tools.

  • CLI
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Node-RED

Low-code flow-based tool with built-in MQTT nodes for automation and dashboards.

  • Low-code
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Home Assistant

Open-source home automation with a full MQTT integration.

  • Smart home
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Libraries

PubSubClient

Lightweight MQTT client for Arduino, ESP8266 and ESP32.

  • C++
  • Arduino
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Paho MQTT (Python)

The most popular MQTT client library for Python.

  • Python
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MQTT.js

MQTT client for Node.js and the browser (over WebSocket).

  • JavaScript
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Eclipse Paho

Open-source MQTT clients for Java, C, C++, Go, Rust and more.

  • Java
  • C
  • Go
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MQTTnet

High-performance MQTT library for .NET.

  • C#
  • .NET
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Learn more

mqtt.org

The official home of the MQTT protocol.

  • Reference
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MQTT 3.1.1 specification

The OASIS standard that defines the protocol in detail.

  • Specification
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iotBind

Build IoT projects and dashboards on top of MQTT One.

  • Official
  • Platform
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