Online xxHash64 Hash Generator
A 64-bit xxHash for large data, with an optional seed. Paste your text and click the button to compute its xxHash64 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
45ab6734b21e6968
How to Use
- 1Type or paste the text you want to hash into the Input field.
- 2Open "More settings" to configure the optional seed if needed.
- 3Click the Generate Hash button (or press Ctrl+Enter) to compute the xxHash64 hash.
- 4The xxHash64 hash appears in the Output field. Click Copy to copy it to your clipboard.
- 5Click Clear to empty the fields and start over.
About xxHash64
xxHash64 is an extremely fast non-cryptographic hash function, part of the xxHash family by Yann Collet. xxHash64 produces a 64-bit value and is designed for speed approaching memory (RAM) bandwidth limits.
How it works: xxHash64 processes data in parallel lanes with simple multiply-and-rotate operations that are very friendly to modern CPUs. The result is far faster than cryptographic hashes, while still giving good distribution and low collisions for non-security use.
xxHash64 is ideal for hash tables, in-memory indexes, deduplication, caches, and fast integrity checks on large data. Being non-cryptographic, do not use it for passwords, signatures, or security purposes.
FAQ
Is xxHash safe for security?
No. xxHash is a non-cryptographic hash optimized for SPEED, not security. Use it for hash tables, checksums, deduplication, and non-sensitive integrity. For security, use SHA-256/BLAKE3.
What is the seed option for?
The seed changes the starting value so you get a different hash for the same input. Useful to mitigate collision attacks on hash tables. Default is 0; set it in "More settings".
How long is a xxHash64 hash?
A xxHash64 hash is 64-bit long (16 karakter heksadesimal / 16 hexadecimal characters).
Is my data sent to a server?
No. The xxHash64 hash is computed entirely in your browser. The text you enter never leaves your device.