BLAKE3 Hash Generator

Hash any text with BLAKE3 — the modern successor to BLAKE2, faster than SHA-256 and MD5 on every CPU class. Configurable output length (any number of bytes, not just 256/512 bits). Useful where speed matters and you don't need the constant-time guarantee of HMAC.

How to use the BLAKE3 Hash Generator

Type or paste text, pick an output length (default 32 = 256 bits, matching SHA-256). BLAKE3 supports arbitrary-length output natively — useful for KDF-like usage where you want exactly N bytes without truncation.

Why BLAKE3

BLAKE3 is 2-10x faster than SHA-256 in software on every CPU class — and unlike SHA-256, it parallelizes across cores. The 256-bit security is comparable. It's based on the BLAKE2 design (which itself came out of the SHA-3 competition) with simpler internals.

Use BLAKE3 where you control both ends and care about throughput: file integrity, content-addressed storage, deduplication, fast checksums. Don't use it where you need broad compatibility (TLS, JWT, blockchain) — those ecosystems are standardized on SHA-2 or SHA-3.

Frequently asked questions

Is BLAKE3 better than SHA-256?
It is much faster on modern CPUs and is cryptographically strong, but SHA-256 is more widely supported and mandated by many standards. Choose BLAKE3 when speed matters and you control both ends.

Why can I choose any output length?
BLAKE3 is an extendable-output function, so it can emit any number of bytes from a single computation. The default is 32 bytes (256 bits).

Does the text I hash leave my browser?
No. The hash is computed locally in your browser, so the input is never transmitted.
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