Protocol analysis, encoding/decoding, and communication debugging tools
Online Protocol Buffers encoder/decoder. Parse .proto schemas, encode JSON to binary, or decode binary to JSON
Browser-based MQTT client for connecting, publishing, subscribing, and debugging IoT messages via WebSocket
Test and validate MQTT topic patterns with + and # wildcards against topic names for subscription testing
Encode and decode MQTT protocol packets with detailed field breakdown, hex viewer, and packet builder
Parse, encode, and debug Modbus RTU/ASCII/TCP protocol frames with CRC-16/LRC calculation and serial debugging
Browser-based serial debugging tool - no download required, real-time monitoring via Web Serial API
Protocol tools are essential for IoT developers, embedded systems engineers, and anyone working with communication protocols. These tools help you analyze, debug, and test various protocols including MQTT for IoT messaging, Modbus for industrial automation, Protocol Buffers for efficient serialization, and serial communication for hardware debugging.
Our protocol tools collection provides:
Real-time MQTT client for WebSocket-based IoT communication
Modbus RTU/ASCII/TCP frame parsing and encoding
Protocol Buffers schema validation and data encoding/decoding
Serial port debugging with hex and ASCII views
Topic pattern testing and validation
WebSocket-based MQTT client for testing IoT message publishing and subscription with QoS support.
Parse and encode Modbus RTU/ASCII/TCP frames with CRC/LRC validation for industrial automation.
Encode, decode, and validate Protocol Buffers messages with schema parsing support.
| Protocol Type | Features & Use Cases |
|---|---|
| MQTT | Lightweight publish-subscribe messaging protocol for IoT devices. Supports QoS levels, retained messages, and topic wildcards. |
| Modbus | Industrial protocol for PLC and SCADA systems. Supports RTU (binary), ASCII, and TCP modes with register/coil operations. |
| Protocol Buffers | Binary serialization format by Google. Provides efficient, schema-based data encoding with cross-language support. |
| Serial Communication | RS-232/RS-485 debugging for embedded devices. Real-time hex/ASCII data viewing with configurable baud rates. |
MQTT QoS 0 for telemetry, QoS 1 for important notifications, QoS 2 only for critical transactions. Higher QoS means more overhead.
Always validate CRC/checksums before processing Modbus frames. Use schema validation for Protocol Buffers to catch data errors early.
Implement reconnection logic with exponential backoff. Use keep-alive messages to detect connection issues. Log disconnection events for debugging.
Use TLS/SSL for MQTT (port 8883). Implement authentication for Modbus TCP. Encrypt sensitive data in Protocol Buffers payloads.