Cyclic Redundancy Checksum (CRC) calculations
CRC-16 and CRC-32 are very popular checksum methods, used in many protocols and in data storage. They are much safer than simple adding or xoring, but they take longer time to calculate.
Characters to calculate CRC of:
| Label |
Result |
Name |
Method |
Polynomial |
Init |
End |
| CRC-8 |
- |
CRC-8-AT40 |
Reversed |
0xB1 |
0 |
0 |
| CRC-ARC |
- |
CRC-16-IBM/ANSI |
Reversed |
0xA001 |
0 |
0 |
| CRC-16 |
- |
CRC-16-CCITT |
Normal |
0x1021 |
0 |
0 |
| FCS-16 |
- |
CRC-16-CCITT |
Reversed |
0x8408 |
1 |
1 |
| CRC-32 |
- |
CRC-32 IEEE 802.3 |
Reversed |
0xEDB88320 |
1 |
1 |
| CRC-32C |
- |
CRC-32 Castagnoli |
Reversed |
0x82F63B78 |
1 |
1 |
| CRC-32K |
- |
CRC-32 Koopman |
Reversed |
0xEB31D82E |
1 |
1 |
| XOR-8 |
- |
8-bit xor |
| SUM-32 |
- |
32-bit sum |
| Adler-32 |
- |
Adler-32, RFC-1950 |
Only the low 8 bits of the Unicode character codes are used.
Due to the execution time in JavaScript, a maximum of 32768 characters are allowed.
Other checksum methods were added on August 16, 2017.