Modbus Tools

Professional-grade tools for working with Modbus protocols. All tools run locally in your browser.

Validation

CRC Calculator

Calculate and verify Modbus RTU CRC-16 checksums for your data frames.

Analysis

Frame Decoder

Decode and analyze Modbus RTU, TCP, and ASCII frames in real-time.

Building

TCP Builder

Build and test Modbus TCP frames with automatic MBAP header generation.

Conversion

Register Converter

Convert between different data types and register formats (INT16, INT32, FLOAT, etc.).

Building

RTU Frame Builder

Build complete Modbus RTU frames with automatic CRC calculation.

Reference

Function Code Reference

Quick reference guide for all Modbus function codes and their parameters.

Conversion

ASCII Encoder/Decoder

Encode and decode Modbus ASCII messages with LRC calculation.

Utilities

Address Calculator

Convert between different Modbus address formats and numbering schemes.

Need a Custom Tool?

Can't find what you're looking for? We're always adding new tools based on community feedback. Visit our forum to suggest new features or request specific tools.

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