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CRC & Checksum Calculator
CRC16 Modbus/CCITT/XMODEM, CRC8, LRC, BCC, SUM8 and SUM16 at once.
Open →Modbus RTU Request Builder
Slave ID, function, address, quantity → request bytes with CRC. Accepts 40001 notation.
Open →HEX ↔ ASCII Converter
Bytes to text and back. Control characters as \r \n \xNN.
Open →Modbus Frame Decoder
Paste RTU or TCP bytes to decode slave ID, function, values, CRC, MBAP and exceptions.
Open →Modbus Float Converter
2 or 4 registers ↔ float32/float64/int32. ABCD, CDAB, BADC and DCBA side by side.
Open →Web Serial Terminal
Open a COM port in the browser. HEX/ASCII view, checksum and line endings, save the log.
Open →4–20 mA Scaling Calculator
Current/voltage ↔ engineering units ↔ % ↔ PLC counts (0–27648…). 4/8/12/16/20 mA table.
Open →Pt100 & Thermocouple Converter
Pt100/Pt1000 resistance and type K, J, T, E, N, R, S, B thermocouple mV ↔ °C. Cold junction, tables.
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