MQTT Panel

MQTT Panel

See what is happening on your MQTT brokers: topics, values, history, charts, publishing, and a broker built in.

Mac App Store · coming soonMicrosoft Store · coming soonSource code on GitHub · coming soon

Windows · macOS · Linux · open source, Apache 2.0

What it does

01

Explorer

  • Tree or table: thousands of topics stay fast to browse and search, with + # wildcards or a regular expression.
  • Every message shows its payload, with the changes from the previous one highlighted.
  • Sparklines next to each topic show how a value moved over its last messages.
  • A history list per topic, filterable by one field of a JSON payload.
  • JSON, text, binary, images, Sparkplug B, CBOR, MessagePack and Protobuf are decoded.
The topic tree and the topic table on the Explorer screen, with the payload of a selected topic, its diff and its chart.

02

Charts

  • A series is one topic plus one field of its payload.
  • Numbers are plotted as they are, numeric text is read as a number, true and false become 1 and 0.
  • Two axes when units differ, for example °C on the left and % on the right.
  • A dashboard holds several charts with a shared time range, pause and hover values.
A dashboard chart with three series from one topic.

03

Publish

  • A composer with topic, QoS, retain and the payload format (JSON, text, hex, Base64).
  • Templates for the messages you send often, with placeholders such as {room}.
  • Request and response on MQTT 5: set a response topic and see the reply next to the request.
  • Repeat a message every few seconds to simulate a sensor.
The Publish screen with templates, the composer and the list of sent messages with a reply.

04

Built-in broker

  • TCP, TLS, WebSocket and secure WebSocket listeners, switched on and off one by one.
  • Users with passwords, shared by all listeners.
  • Client certificates issued in one click, exported as PEM or PKCS#12.
  • A local certificate authority is created on first start.
  • Every change applies at once, without restarting the broker.
The built-in broker with its listeners, users, client certificates and connected clients.

05

Security

  • TLS with your own CA, client certificates and keys (PEM or PKCS#12).
  • A broker with a self-signed certificate can be trusted by pinning its certificate.
  • Passwords, keys and passphrases are stored encrypted on your computer, never in profile files.
  • Nothing leaves your computer: no telemetry, no account, no crash reports.
A connection profile with its security settings: CA, client certificate and key.

06

Command line

  • mqttpanel sub and mqttpanel pub, with the same profiles and secrets as the app.
  • mqttpanel broker starts the built-in broker without a window.
  • Text, JSON, NDJSON or raw output for scripts.
# watch a building, with a saved profile
$ mqttpanel sub --profile "Plant broker" -t 'building/f2/#'
# send one message
$ mqttpanel pub -h localhost -t demo/hello -m 'hi'
# run the broker on this computer
$ mqttpanel broker --bind 127.0.0.1

A closer look

Screens from the app, with demo data.

The Connect screen with three connected profiles and their tabs.
Every open connection gets a tab with its live figures; the cards show which profiles are connected.
A temperature topic with its history list and the change from the previous message.
Pick an earlier message of a topic: the payload shows what changed from the one before.
The Explorer as a table of topics.
The same topics as a flat table, sortable by any column.
The Explorer in dark mode.
Follows the system appearance, light or dark.

Your data stays yours

MQTT Panel collects nothing. It talks only to the brokers you configure.

Read the privacy statement →