MQTT Commander

See the MQTT messages your devices publish. Live topics, JSON payload inspection, safe publish tools and a Connection Doctor for TLS and auth failures.

Debug MQTT on iPhone and iPad with live topics, JSON payload inspection, safe publish tools, and Connection Doctor for TLS/auth failures.

MQTT Commander is built for developers, IoT engineers, smart home power users, QA teams, and embedded projects that need to see what a broker sends.

Use it to: • Monitor Home Assistant, Zigbee2MQTT, Mosquitto, ESPHome, and custom MQTT brokers • Browse live topics and inspect payloads without exposing private values by default • Read JSON payloads, compare changes, and copy useful paths • Publish test messages with QoS, retain, templates, and safer retained-delete flows • Diagnose host, port, TLS, mTLS, certificate, and authentication issues • Review message history and export logs for debugging

WORKSPACES • Connections: save broker profiles, connect/disconnect, monitor status • Live Topics: discover topics with a filtered tree or whole-broker view • Message Log: traffic history filtered by topic, payload, QoS or time, with JSON/CSV/NDJSON export • Publish: compose messages with templates, smart home presets, retained delete • Certificates: import CA and client certs, configure TLS/mTLS with SNI/ALPN • Connection Doctor: diagnose host/port/auth/TLS issues with recovery hints • Profiles & Diagnostics: manage brokers and review privacy-safe events

SHORTCUTS, WIDGETS & AUTOMATION • Siri & Shortcuts: publish a saved command by voice or from any Shortcut • Automations: trigger an MQTT publish on arrival, time, NFC, or any iOS automation • Widgets: publish button, sensor value, and sensor trend graph on your Home Screen

PRIVACY MQTT Commander includes anonymous diagnostics for crash reporting and product analytics. These are on by default and can be turned off in Settings. No ad tracking. Your data is never sold. Powered by Sentry and Aptabase.

FREE VS PRO Monitor topics, inspect JSON payloads, run the Connection Doctor, and publish messages with QoS and retain. All of that stays free and unlimited, with no subscription and no ads. Unlock Pro once to add: • Live Topic Board: an always-on dashboard of pinned topics • Certificate Manager: saved CA/client identities, pinning, ALPN • Templates and Saved Commands for faster publishing • Session Replay, cross-session history, and unlimited profiles • Advanced log filters with JSON/CSV/NDJSON export • Full 12-step Connection Doctor with shareable report • Widgets and Shortcuts

PRICE The app is free. Pro is a one-time purchase with no subscription and no ads. Restore Purchases works on any device signed into your Apple ID. If you bought the paid app, you keep Pro at no cost.

REQUIREMENTS • iOS 17 or later, iPhone and iPad • Local Network access for broker connections

Demo mode included, no real broker required to explore the app.