About the BLAKE3 Hash Generator
BLAKE3, released in 2020, is a successor to BLAKE2 built on a tree structure that lets it use multiple CPU cores and SIMD instructions, making it dramatically faster than SHA-2 while remaining secure. It produces a 256-bit output by default but can produce any length. It is used in fast content-addressed storage, backup and deduplication systems.
The tree is a Merkle tree over 1024-byte chunks, and it buys more than raw throughput. Because every chunk has its own subtree, a peer can prove that one piece of a large file is correct without transmitting the rest, which is precisely what content-addressed stores and sync tools want. It also means hashing scales with the number of cores you give it, where SHA-256 is stuck on a single sequential chain no matter what hardware sits underneath.
BLAKE3 is really an extendable output function with three modes, plain hashing, keyed hashing and key derivation, all running the same compression function with different flags set. Unlike BLAKE2b, its shorter outputs are true prefixes of longer ones, so the first 32 bytes of a 64-byte digest are exactly the default 256-bit digest and truncation is safe here. This tool computes the 256-bit output locally from your text. Like the other fast hashes it is not for password storage; use Argon2 where a password is involved. Output is hex or Base64.
How to use
- Paste text.
- Choose the output format.
- Copy the BLAKE3 hash.
Common questions
- Why is BLAKE3 so fast?
- Its tree structure allows parallelism across CPU cores and SIMD, unlike the sequential SHA-2.
- Is it secure?
- Yes, with a strong security margin and no known practical attacks.
- What is the default output length?
- 256 bits, though BLAKE3 can produce output of any length.