MQTT Connect
Secure by design.
Private by default.
No cloud, no account, no telemetry. Every broker, client, credential and certificate stays encrypted on your device — MQTT Connect is built so there's nothing to leak, because there's nowhere for it to go.
Live on the App Store and Google Play · fully private
Built for people who actually run brokers.
Every screen is designed around the workflow of debugging and operating real MQTT deployments — not a toy demo client.
Client certificates & mTLS
Import CA certs, client certs and keys from PEM, paste them
directly, or unlock a
.p12
bundle in one step — full mutual TLS, no laptop required.
Live message feed
Watch subscribed topics stream in real time, expand any message for QoS, retain flag and payload, and re-send or edit-and-send instantly.
Publish composer
Compose JSON, text, or Base64 payloads with topic autocomplete drawn from your history, and pin frequent sends as snippets.
TCP, TLS, WS & WSS
Full MQTT 3.1.1 and 5.0 support over every standard transport, with per-client keep-alive, clean-session, and timeout controls.
Smart topic suggestions
Subscriptions and publishes both surface topics you've used before on that client, so you're never retyping long topic paths.
Brokers & clients, kept apart
Save a broker's host, port and transport once, then create as many clients against it as you need — each with its own ID, auth and certs.
Encrypted backup & restore
Export any set of clients and brokers — credentials and certificates included — into a single AES-256 file locked with a password only you know, and import it back on another device.
Your credentials never leave your device.
There's no account, no backend, and nothing phoning home — private by default. MQTT Connect only talks to the brokers your clients connect to.
Broker profiles, clients, usernames, passwords and certificates are held in the OS keychain and encrypted storage — never in plain text.
No analytics SDKs, no crash reporters phoning a server, no usage tracking of any kind.
Gate the app behind biometrics, auto-lock after inactivity, and hide payload previews in the app switcher.
Client certificates and private keys are read once through the system file picker and stay on-device unless you explicitly export them.
Exports are locked with AES-256 and a password only you choose — the file is useless to anyone without it, on or off your device.
A workspace for every connection.
Tabs for topics, publishing, and the live feed — all scoped to the client you're working in.
Client certificate
Live feed
Publish
Topics
I'm the CTO of an IoT company, managing all kinds of connected devices day to day — and MQTT Connect exists because I needed it myself. Built with care, it's exactly the MQTT client I wanted on my own phone.
I've also built SSH Connect, an offline SSH client and encrypted vault, plus a few other privacy-first apps — see everything I've made.
Take your clients with you.
MQTT Connect is live on the App Store and Google Play.
MQTT Connect is live on the App Store — download it now.
Download on the App StoreMQTT Connect is live on Google Play — download it now.
Get it on Google Play