Calculate CRC-16/CCITT-FALSE from text. The output is a 4-character hexadecimal checksum.
CRC-16 names are easy to mix up. This profile uses polynomial 0x1021, initial value 0xFFFF, no reflected input or output, and final XOR 0x0000.
If another system says only CRC-16, confirm the full profile before comparing values. XMODEM, KERMIT, MODBUS, ARC, and CCITT-FALSE can all produce different results for the same text.
It returns a 16-bit checksum, usually written as 4 hexadecimal characters.
Paste text into the input pane. Batch mode calculates one CRC-16/CCITT-FALSE value per line.
CRC-16/CCITT-FALSE uses polynomial 0x1021, initial value 0xFFFF, no reflection, and final XOR 0x0000.
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