Compare software

MQTT5 ExplorerMQTT.fx
Free

Free and open source under the GPL-3.0 licence.

 Paid

Commercial licence with a free trial.

Linux macOS
  • Aims to support all MQTT 5 features
  • Works with any MQTT broker
  • Tests broker connections without writing code
  • Eclipse Sparkplug explorer and editor
  • Small project with a limited community
  • Release activity is not clear from the repository page
  • Paid after the trial
  • Free open-source MQTT clients cover basic use
Downloadable app Downloadable app
Open source Closed source
License: GPL-3.0-only License not stated
No account needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked October 1, 2026

Checked October 2, 2026

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