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Online CRC Calculator

Compute CRC-16, Modbus RTU, and CRC-32 checksums for hex payloads used in robotics, PLCs, and embedded systems.

Input

Result

Checksum

0B C4

Bytes Parsed:

01 03 00 00 00 02

CRC-16/IBM (Modbus-compatible polynomial)

Typical Robotics Uses

  • Modbus RTU telemetry for motor drivers and PLCs
  • CRC validation for UART/RS485 sensor packets
  • CRC-32 for firmware update integrity

Byte Order Tips

  • Modbus RTU appends CRC as [Low][High] bytes
  • CRC-16/IBM often shown as High Low in datasheets
  • CRC-32 displayed big-endian; transmit per protocol