CRC-32 checksum calculator

Use this tool to quickly calculate CRC-32 checksums.

Use this tool to quickly calculate CRC-32 checksums.

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CRC32 (Cyclic Redundancy Check 32) is an error-detecting algorithm that calculates a 32-bit checksum value for a block of data. It is commonly used in network protocols, data transmission, and file integrity verification.

The CRC32 algorithm works by dividing the input data into fixed-size blocks and performing a series of bitwise XOR and shift operations. The algorithm generates a remainder value that serves as the checksum. This remainder value is appended to the data or transmitted separately for error detection purposes.

CRC32 is efficient and simple to implement, making it widely adopted in various applications. It can quickly detect errors such as single-bit flips and certain types of multiple-bit errors. However, it is important to note that CRC32 is not a cryptographic hash function and should not be relied upon for cryptographic purposes.

CRC32 checksums are used extensively to verify data integrity during transmission or storage. When the calculated CRC32 checksum does not match the expected value, it indicates a possible data corruption or transmission error.

CRC32 is the ITU I.363.5 algorithm used by BZIP2.

CRC 32 B is the 32-bit Frame Check Sequence of ITU V.42 used in Ethernet and PKZip.