Features

Everything you need to work with MQTT

A complete debugging toolkit built mobile-first for iPhone and iPad — not a thin viewer.

Diagnostics

Connection Doctor →

Walks the connection one stage at a time — DNS, TCP, TLS, WebSocket, MQTT — and names exactly what broke, with a fix.

 Security

Certificate Wizard →

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

Everything you need to work with MQTT

A full debugging toolkit — not a thin viewer. Built mobile-first for the way you actually work.

Broker profiles & templates

Save unlimited brokers with ready-made templates for Mosquitto, Home Assistant, Zigbee2MQTT and AWS IoT. Auto-reconnect 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.

Coming soon to theApp Store

Coming soon to the App Store · $2.99