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Software · Development

MQTTy

GUI for consuming MQTT topics.

  • Completely free
  • Linux
  • Open source

Overview

Features described in its Flathub listing and in its GitHub repository: debugging and syntax highlighting.

Services and protocols mentioned: MQTT.

Overview written by LicitPro from the documentation published by the authors and the cited sources; we have not tried the resource ourselves.

Excerpts that establish this information
  • “MQTTy it's a native MQTT GUI client written in Rust, that allows you to do what an MQTT client does, but in an easy and graphical way, with a focus on debugging and testing MQTT topics.” — GitHub, 10 November 2026
  • “Integrated code editor, with syntax highlighting for JSON and XML.” — Flathub, 10 November 2026

At a glance

MQTTy is completely free: it is open source software, and every feature is available without paying or subscribing.

Its licence (GPL-3.0+) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Strengths

  • Open source code
  • Commercial use allowed

About

A native GUI MQTT client development tool, with the purpose of debugging and testing IoT applications that makes use of the MQTT protocol. Features: Publish to topics (In futures versions, it will also allow you to subscribe). Integrated code editor, with syntax highlighting for JSON and XML. Allows you to have multiple MQTT connections separated in different tabs

Description from Flathub — AppStream (Flathub)

Sources and checks

  • Facts collected from Flathub (credit card, source code, publisher, licence, free status, platforms, commercial use, version) —
  • Last technical check: 8 November 2026
  • Description from Flathub — AppStream (Flathub)

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