CRC64 Calculator - Generate CRC-64 Checksums Online

Calculate CRC64 checksums used in Redis, PostgreSQL and XZ compression. Multiple CRC-64 variants. Free online CRC64 generator - works in browser.

Input Text

Or Select File

Drop file here or click to browse

CRC64 Variant

CRC64 Checksum

Variant Info

Algorithm: CRC-64-ECMA

Polynomial: 0x42F0E1EBA9EA3693

Output: 64 bits (8 bytes)

MurmurHash Generator - Fast Hash for Has…

RIPEMD-160 Hash Generator - Bitcoin Addr…

djb2 Hash Generator - Daniel Bernstein S…

SHA-512 Hash Generator - Create 512-bit …

Whirlpool Hash Generator - 512-bit Hash …

View all Hash hashers →

Frequently Asked Questions

CRC64 is a 64-bit Cyclic Redundancy Check providing stronger error detection than CRC32. It's used in Redis cluster slot hashing, PostgreSQL, XZ compression, and large file verification.

Common variants include CRC-64-ECMA (ECMA-182), CRC-64-ISO (ISO 3309), CRC-64-XZ (used in XZ Utils), and CRC-64-Redis (Jones polynomial).

Redis uses CRC64 for cluster key hashing. PostgreSQL uses it internally. XZ compression (LZMA2) uses CRC-64-XZ. It's also used in large file verification and data storage.

CRC64 detects more error patterns than CRC32 due to its larger size. Use CRC64 for larger files or when you need stronger integrity guarantees.

No. CRC64 is designed for error detection, not security. While harder to forge than CRC32, it's still vulnerable to intentional collision attacks. Use SHA-256 for security.

CRC64 produces a 64-bit (8-byte) value, shown as 16 hexadecimal characters like 'A1B2C3D4E5F6G7H8'.

Redis uses CRC64 with the Jones polynomial (0xAD93D23594C935A9) for cluster slot hashing, also known as CRC-64-Jones.

Yes. All computation happens in your browser using JavaScript. Your data never leaves your device.

Related Tools