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MQTTXMQTT CLI
Free

Free to download and use.

 Free

Free and open source under the Apache 2.0 licence, backed by HiveMQ.

Windows, macOS, Linux, Web, Self-hosted, Command line Windows, Command line
  • Desktop, CLI and web versions share one workflow
  • Supports MQTT 5.0, 3.1.1 and 3.1
  • Full MQTT 5.0 and 3.1.1 feature support
  • Interactive shell with syntax highlighting and command history
  • Focused on MQTT only, not general HTTP APIs
  • Some features steer toward the EMQX ecosystem
  • Command line only, with no graphical interface
  • Some commands only apply to HiveMQ brokers
Downloadable app, Web application, Self-hosted Downloadable app
Open source Open source
License not stated License: Apache-2.0
No account needed No account needed
Not stated if it works offline Not stated if it works offline

Checked September 24, 2026

Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.