Hex Input

313233343536373839

ASCII Input

123456789

CheckSum8 Xor
CheckSum 8 Xor

Normal

31

CheckSum8 Modulo 256
Sum of Bytes % 256

Normal

DD

CheckSum8 2s Complement
0x100 - Sum Of Bytes

Normal

23

CRC-16
(MODBUS)

Generator Type	Big Endian (ABCD)	Little Endian (DCBA)
Normal	37 4B	4B 37
Reversed	--	--
Reversed Reciprocal	--	--

CRC-16-CCITT
(X.25, V.41, HDLC, XMODEM, Bluetooth, SD, many others; known as CRC-CCITT)

Generator Type	Big Endian (ABCD)	Little Endian (DCBA)
Normal 0x1021	73 0C	0C 73
Reversed 0x8408	89 21	21 89
Reversed Reciprocal 0x8810	D1 83	83 D1

CRC-16-IBM
(Bisync, Modbus, USB, ANSI X3.28, many others; also known as CRC-16 and CRC-16-ANSI)

Generator Type	Big Endian (ABCD)	Little Endian (DCBA)
Normal 0x8005	AD AF	AF AD
Reversed 0xA001	3D BB	BB 3D
Reversed Reciprocal 0xC002	9E 77	77 9E

CRC-16-T10-DIF
(SCSI DIF)

Generator Type	Big Endian (ABCD)	Little Endian (DCBA)
Normal 0x8BB7	C0 C6	C6 C0
Reversed 0xEDD1	EE 39	39 EE
Reversed Reciprocal 0xC5DB	CF EC	EC CF

CRC-16-DNP
(DNP, IEC 870, ModBus)

Generator Type	Big Endian (ABCD)	Little Endian (DCBA)
Normal 0x3D65	91 00	00 91
Reversed 0xA6BC	7D 15	15 7D
Reversed Reciprocal 0x9EB2	2F 6C	6C 2F

CRC-16-DECT
(Cordless Telephones)

Generator Type	Big Endian (ABCD)	Little Endian (DCBA)
Normal 0x0589	F2 03	03 F2
Reversed 0x91A0	B0 CA	CA B0
Reversed Reciprocal 0x82C4	39 6E	6E 39

CRC-32
(ISO 3309, ANSI X3.66, FIPS PUB 71, FED-STD-1003, ITU-T V.42, Ethernet, SATA, MPEG-2, Gzip, PKZIP, POSIX cksum, PNG, ZMODEM)

Generator Type	Big Endian (ABCD)	Little Endian (DCBA)	Mid-Big Endian (BADC)	Mid-Little Endian (CDAB)
Normal 0x04C11DB7	E9 2B 4F FC	FC 4F 2B E9	2B E9 FC 4F	4F FC E9 2B
Reversed 0xEDB88320	26 39 F4 CB	CB F4 39 26	39 26 CB F4	F4 CB 26 39
Reversed Reciprocal 0x82608EDB	1E 66 7E E0	E0 7E 66 1E	66 1E E0 7E	7E E0 1E 66

CRC-32C (Castagnoli)
(iSCSI & SCTP, G.hn payload, SSE4.2)

Generator Type	Big Endian (ABCD)	Little Endian (DCBA)	Mid-Big Endian (BADC)	Mid-Little Endian (CDAB)
Normal 0x1EDC6F41	BE 17 84 F2	F2 84 17 BE	17 BE F2 84	84 F2 BE 17
Reversed 0x82F63B78	83 92 06 E3	E3 06 92 83	92 83 E3 06	06 E3 83 92
Reversed Reciprocal 0x8F6E37A0	B5 A5 1F AE	AE 1F A5 B5	A5 B5 AE 1F	1F AE B5 A5

CRC-32K (Koopman)

Generator Type	Big Endian (ABCD)	Little Endian (DCBA)	Mid-Big Endian (BADC)	Mid-Little Endian (CDAB)
Normal 0x741B8CD7	42 3E C0 E4	E4 C0 3E 42	3E 42 E4 C0	C0 E4 42 3E
Reversed 0xEB31D82E	AE D0 3D 2D	2D 3D D0 AE	D0 AE 2D 3D	3D 2D AE D0
Reversed Reciprocal 0xBA0DC66B	61 F2 79 DE	DE 79 F2 61	F2 61 DE 79	79 DE 61 F2

CRC-32Q
(aviation; AIXM)

Generator Type	Big Endian (ABCD)	Little Endian (DCBA)	Mid-Big Endian (BADC)	Mid-Little Endian (CDAB)
Normal 0x814141AB	54 83 26 95	95 26 83 54	83 54 95 26	26 95 54 83
Reversed 0xD5828281	79 81 CC A9	A9 CC 81 79	81 79 A9 CC	CC A9 79 81
Reversed Reciprocal 0xC0A0A0D5	D9 0D 68 BE	BE 68 0D D9	0D D9 BE 68	68 BE D9 0D