01
Connections and subscriptions
MQTT 3.1.1 / 5.0, TLS and will messages, with the subscription tree expanded by topic hierarchy.
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内置插件
内置插件MQTT
Make MQTT debugging visual
Connection management, a subscription tree, message log and multi-format payload decoding — IoT debugging without the command line.
- Multi-connection and subscription management
- Message log with multi-format payload decoding
- Publish and replay online
Screenshots
All screenshots are rendered from the real plugin UI (2x hi-res).
In action
Every capability comes with a real screenshot — see what it looks like in daily work.
02
Payload decoding
Switch between plain text, JSON, Base64, Hex and CBOR views; JSON is formatted automatically.
Capabilities
Details refined for daily use — not a checklist of features.
Connections and subscriptions
MQTT 3.1.1 / 5.0, TLS and will messages, with the subscription tree expanded by topic hierarchy.
Payload decoding
Switch between plain text, JSON, Base64, Hex and CBOR views; JSON is formatted automatically.
Publish and replay
Optional QoS and retain, and one-click resend of any historical message to reproduce an issue.
Two ways to use it
A focused app that does just this, or a plugin inside your existing OTools workspace?
Recommended
Standalone app
A dedicated desktop app with the same engine but only this plugin’s features. Double-click and go — no OTools required.
- macOS · .dmg
- Windows · .exe
- Linux · .AppImage / .deb / .rpm
Installers live on GitHub Releases; built-in auto-update.
As a plugin
Add it to your existing OTools and work alongside your other tools, sharing tabs and shortcuts.
- Download and install OTools desktop
- Open the Plugin Marketplace
- Search this plugin and install with one click
The plugin updates together with OTools.