Tools
CRC / Checksum Calculator
Compute CRC-8, CRC-16, and CRC-32 checksums for any byte sequence — hex, ASCII, or decimal. All calculations run in your browser.
4 bytes · 01 02 03 04
8 Algorithms
CRC-8
8-bit0xE3
Dec: 227Bin: 11100011
Poly: 0x07 · Init: 0x00
CRC-8/MAXIM
8-bit0xF4
Dec: 244Bin: 11110100
Poly: 0x31 · Init: 0x00
CRC-16/IBM
16-bit0x0FA1
Dec: 4001Bin: 0000111110100001
Poly: 0x8005 · Init: 0x0000
CRC-16/CCITT
16-bit0x89C3
Dec: 35267Bin: 1000100111000011
Poly: 0x1021 · Init: 0xFFFF
CRC-16/MODBUS
16-bit0x2BA1
Dec: 11169Bin: 0010101110100001
Poly: 0x8005 · Init: 0xFFFF
CRC-16/XMODEM
16-bit0x0D03
Dec: 3331Bin: 0000110100000011
Poly: 0x1021 · Init: 0x0000
CRC-32
32-bit0xB63CFBCD
Dec: 3057449933Bin: 10110110001111001111101111001101
Poly: 0x04C11DB7 · Init: 0xFFFFFFFF
CRC-32/MPEG-2
32-bit0x793737CD
Dec: 2033661901Bin: 01111001001101110011011111001101
Poly: 0x04C11DB7 · Init: 0xFFFFFFFF