Online CRC64 Hash Generator
A 64-bit checksum (ECMA-182) for large data. Paste your text and click the button to compute its CRC64 hash — everything runs on your device and is never sent to a server.
Everything runs in your browser. Your data is never sent to our servers.
Example
Example Input
hello world
Example Output
12511f272d9bc22a
How to Use
- 1Type or paste the text you want to hash into the Input field.
- 2Click the Generate Hash button (or press Ctrl+Enter) to compute the CRC64 hash.
- 3The CRC64 hash appears in the Output field. Click Copy to copy it to your clipboard.
- 4Click Clear to empty the fields and start over.
About CRC64
CRC64 (Cyclic Redundancy Check) is an error-detecting code that produces a 64-bit checksum from data. CRC is widely used in networking, storage, and communication protocols to ensure data isn't corrupted in transit or at rest.
How it works: CRC treats the data as a large polynomial and divides it by a fixed generator polynomial; the remainder is the CRC value. A small change in the data yields a very different CRC, so errors are easy to detect.
CRC64 (the ECMA-182 variant) offers a larger value space, lowering checksum-collision risk for large data. It is used, among others, in the xz compression format.
FAQ
Is CRC safe for security?
No. CRC is a non-cryptographic checksum designed to DETECT transmission/storage errors, not for security. CRC is easy to forge intentionally, so do not use it for security-sensitive integrity — use SHA-256 or higher.
How long is a CRC64 hash?
A CRC64 hash is 64-bit long (16 karakter heksadesimal / 16 hexadecimal characters).
Is my data sent to a server?
No. The CRC64 hash is computed entirely in your browser. The text you enter never leaves your device.