Features

Everything you need to work with MQTT

A complete debugging toolkit, built mobile-first for iPhone and iPad.

Diagnostics

Connection Doctor →

Walks the connection one stage at a time (DNS, TCP, TLS, certificate, ALPN/SNI and MQTT, with WebSocket/WSS upgrades surfacing inside TCP/TLS) and names what broke, with a fix.

 Security

Certificate Manager →

Import a CA (PEM) and a client identity (.p12/.pfx bundle), check the certificate expiry, SAN/CN and ALPN, and connect over TLS or mTLS.
Toolkit

Everything you need to work with MQTT

A full debugging toolkit, built mobile-first for the way you work.

Broker profiles & templates

Save your brokers with ready-made templates for Mosquitto, Home Assistant, Zigbee2MQTT and AWS IoT. You get one profile free and more with Pro, and the app reconnects with backoff when the network changes.

MQTT 3.1.1 & 5.0

Full MQTT 5 properties, QoS 0/1/2, retained messages, Last Will, wildcard and shared subscriptions, over TCP, TLS, WebSocket or WSS.

Payload Inspector

Pretty-print and syntax-highlight JSON, diff two payloads, decode hex and Base64, preview images, and copy any value by JSONPath.

Topic tree & smart-home presets

Browse the whole broker or jump straight to homeassistant/# and zigbee2mqtt/#. Retained markers, regex filtering, and built to handle thousands of topics.

Safe publish composer

Draft-first publishing with QoS, a retain warning, explicit retained-delete confirmation, reusable templates and safe home-automation presets.

Message log & export

Filter traffic by topic, payload, direction, QoS or errors, then export to CSV or JSON, with secrets and raw payloads redacted.

Get MQTT Commander

Native for iPhone and iPad. One-time purchase, no subscription.

Download on theApp Store

Free · Pro unlock $4.99, one-time