MQTT.fx 1.2.0 is here!

It’s time for the next MQTT.fx release: MQTT.fx 1.2.0!
Most of the changes are under the hood, but in fact there also some new usability improvements.


As always you can download latest binaries/installers at

Please Report bugs and feature requests  via the issue tracker.

Release Notes

  • [New] Payload can now be decoded and exported in JSON format
  • [New] Topic of received messages can now be copied (and pasted)
  • [New] Eclipse Paho 1.1.0 included
  • [New] Bundled with JRE 1.8.0_102
  • [Fixed] Memory leak in terms of received and published messages
  • [Fixed] Issue when clearing the received messages buffer
  • [Fixed] Issue when last choosen import/export location is no longer valid

Display payload as JSON

Introcuding a new payload decoding option:

Publish unformatted JSON demo message:


Display plain JSON message:


Display formatted JSON message:


Speaking of decoding payload: next release is going to support custom payload decoder plugins!

Copy Topic

You now can copy (and paste) the topics of received messages:


9 Replies to “MQTT.fx 1.2.0 is here!”

  1. Richard ClarkeOctober 8, 2016 at 05:38Reply

    Hi, great MQTT utility, thanks for your efforts. Version 1.1 was working well (apart from the memory leak) on Mint 18, however version 1.2 with no bundled JRE for Linux seems to install OK but I can’t find any application to run!


    1. Jens DetersOctober 8, 2016 at 14:40Reply

      Right! Will provide bundled packages then, stay tuned!

  2. Richard ClarkeOctober 8, 2016 at 21:35Reply

    Awesome, thanks!

  3. Richard ClarkeOctober 10, 2016 at 21:07Reply

    Thansk Jens, I’ll do that as soon as I can and get back to you. Thanks again for your prompt reponse to my problem.

  4. Richard ClarkeOctober 11, 2016 at 21:31Reply

    Hi Jens, so far I’ve installed the new version 1.2 deb package on an Ubuntu 14.04 machine. Although Ubuntu Software Centre complained about it being a “package of poor quality”, it did install OK and seems to run OK. Have still to try it on my Mint 18 (KDE) machines. When I’ve done that I’ll report back.

  5. Richard ClarkeOctober 14, 2016 at 10:11Reply

    All good now with the version 1.2.1 update on Linux Mint 18. Thanks!

  6. boudjemaaMarch 2, 2017 at 22:55Reply

    good work wher i can find source code of MQTT.fx

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