Checksum & CRC Calculator

Calculate CRC-8, CRC-16, CRC-32, Modbus CRC, and LRC checksums for data verification

Input Mode

Hex StringASCII Text

Hex Input (space-separated)

e.g., 48 65 6C 6C 6F or 48656C6C6F

Data Preview

Bytes5

Hex48 65 6C 6C 6F

ASCIIHello

Results

Algorithm

Hex

Decimal

CRC-8

0xF6

246

CRC-16/IBM (ARC)

0xF353

62291

CRC-16/CCITT

0xCBD6

52182

CRC-16/Modbus

0xF377

62327

CRC-32

0xF7D18982

4157704578

LRC (Modbus)

0x0C

12

8-bit Checksum

0xF4

244

XOR Checksum

0x42

66

Algorithm Specifications

Algorithm

Polynomial

Init

Reflect

CRC-8

0x07

0x00

No

CRC-16/IBM

0x8005

0x0000

Yes

CRC-16/CCITT

0x1021

0x0000

No

CRC-16/Modbus

0x8005

0xFFFF

Yes

CRC-32

0x04C11DB7

0xFFFFFFFF

Yes