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The Free Public MQTT Broker

An MQTT broker, which is the heart of the MQTT Publish/Subscribe protocol, is a server that receives all messages from the MQTT clients and then routes the messages to the appropriate subscribing clients. We host a free online public MQTT broker and HiveMQ MQTT WebSocket client to make it easy for you to experiment with MQTT messages. To evaluate an enterprise-ready MQTT broker, check out HiveMQ MQTT broker.
For a quick introduction to MQTT, check out our MQTT Essentials blog series, our MQTT Glossary Page and MQTT FAQ.

Public MQTT Broker

Public MQTT Broker
Our Public HiveMQ MQTT broker is open for anyone to use. Feel free to write an MQTT client that connects with this broker. We have a dashboard so you can see the amount of traffic on this broker. We also keep a list of MQTT client libraries that can be used to connect to HiveMQ.

You can access the broker at:


TCP Port: 1883

Websocket Port: 8000

MQTT Browser Client

The HiveMQ MQTT Browser Client is an MQTT WebSocket client interface. Use any modern browser on any device as a full-fledged MQTT client and take full advantage of the MQTT protocol.

For an in-depth evaluation of HiveMQ, visit our Get HiveMQ page or get all information about our MQTT broker.