Calculate CRC64 checksums online. CRC64 is a 64-bit cyclic redundancy check used for error detection and deduplication in storage systems and the xz format.
CRC64 is the 64-bit version of the cyclic redundancy check. The wider 64-bit value makes accidental collisions far less likely than CRC32, so it is favoured for large datasets and storage where a stronger error-detection guarantee is wanted. You will find CRC64 in the xz compression format, in databases and deduplication systems, and in integrity fields for large files. Like all CRCs it detects accidental corruption, not malicious tampering.
Input:
abc
Output:
2cd8094a1a277627
How is CRC64 better than CRC32?
The 64-bit width drastically lowers the chance of two different inputs sharing a checksum, which matters when you are verifying huge numbers of records or files.
Is CRC64 cryptographically secure?
No. It is an error-detecting checksum only. For security against intentional modification, use a cryptographic hash like SHA-256.
Which CRC64 variant is this?
Common variants are CRC-64/ECMA-182 (used by xz) and CRC-64/XZ; results vary by polynomial and reflection settings.
Generate CRC64 hashes for robust data integrity checks and error detection in large datasets.
Supported Tools: