Generate requests and responses, parse Modbus RTU frames, and calculate CRC-16 checksums.

Generate and parse Modbus TCP frames. Inspect MBAP headers, function codes and register data.

Connect a serial device in a browser with Web Serial support. Send requests, inspect responses and chart parsed values.

Generate and parse Modbus ASCII requests and responses. Calculate LRC checksums and inspect frame fields.

Convert Modbus request addresses, numbers starting from 1, and five- or six-digit reference addresses.

Decode a block of registers with names, data types, byte order and scaling, then export the results as CSV.

Inspect status words, toggle bits, extract fields and calculate bitmasks.

Paste a read request and response to check their fields and view register values.

Convert complete Modbus RTU, TCP and ASCII requests or responses, with CRC/LRC validation.

Estimate FC03/04 read time and the continuous polling period for multiple devices.

Convert hex to decimal and decimal to hex instantly. Copy exact integer results, or decode IEEE 754 floats with selectable byte order.

Convert integers between binary, octal, decimal and hexadecimal without losing large-integer precision.

Convert hexadecimal to and from ASCII or UTF-8 text, including Chinese characters and line breaks. Copy the results.

Convert unsigned packed BCD to decimal and back, with 16-bit or 32-bit output.

Compare two hexadecimal frames byte by byte to find changed positions and length differences.

Map values from one range to another, or use gain and offset. Useful for rescaling, linear calibration and analog signals.