tree-based · parallel · next-gen BLAKE

BLAKE3 hash generator

BLAKE3 is the next generation of BLAKE. Tree-based design enables massive parallelism — 10x faster than BLAKE2 on multi-core hardware. Used in some package managers and backup tools. Outputs 256-bit fixed-length or unlimited XOF mode.

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BLAKE3 hash (via WebAssembly or placeholder)
BLAKE3 requires a full tree-based implementation not available in pure JavaScript in the browser. Use the reference blake3 crate (Rust), blake3 npm package (Node.js), or command-line b3sum tool. BLAKE3 produces a 32-byte (256-bit) hash with optional extendable output (XOF). Key features: Merkle tree construction for parallelism, 1,024-byte chunk size, and ~30 GB/s on a single core.

How to use this tool

  1. Type or paste text into the Input text box — the character counter below it updates live as you type.
  2. Read the BLAKE3 hash panel, which points to where you can compute the hash natively: the blake3 Rust crate, the blake3 npm package, or the b3sum CLI.
  3. Press Copy to copy that reference note to your clipboard.
  4. Press Clear to empty the input box and reset the counter.

Why this tool is helpful

Learn BLAKE3 fundamentals

Get a concise summary of what BLAKE3 is: a tree-based, parallel cryptographic hash that outputs a 32-byte (256-bit) digest with optional extendable output (XOF).

Find the right implementation

The page points you to where BLAKE3 is actually available — the blake3 Rust crate, the blake3 npm package, and the b3sum CLI.

Understand its speed

See the design behind the performance: Merkle tree construction, 1,024-byte chunks, ~30 GB/s on a single core, and ~10x BLAKE2 on multi-core hardware.

Check the standard

Reference RFC 9578 and the algorithm's authors, so you can cite the source when evaluating or adopting BLAKE3.

Choose fixed vs. XOF output

Note the difference between a fixed 256-bit digest and unlimited-length XOF output, useful for key derivation and streams.

Stay private

This is a client-side reference page. Nothing you type is uploaded, logged, or sent to a server.

FAQ

What is BLAKE3?

BLAKE3 is a cryptographic hash function and the successor to BLAKE2. Its tree-based (Merkle tree) design enables massive parallelism, and it produces a fixed 32-byte (256-bit) digest or unlimited XOF output.

Does this page compute a hash in my browser?

No. A full tree-based BLAKE3 implementation isn't available in pure JavaScript here, so the panel shows a reference note instead of a live digest.

How do I actually generate a BLAKE3 hash?

Use the blake3 Rust crate, the blake3 npm package in Node.js, or the b3sum command-line tool — all referenced on this page.

What is XOF (extendable output) mode?

In addition to the fixed 32-byte digest, BLAKE3 can produce output of any length (XOF). That's handy for key derivation and stream encryption where you need more than 256 bits.

How fast is BLAKE3?

Around 30 GB/s on a single core and roughly 10x faster than BLAKE2 on multi-core hardware, thanks to its 1,024-byte chunks and tree parallelism.

Is BLAKE3 standardized?

It's described in RFC 9578 (informational), authored by Jack O'Connor, Jean-Philippe Aumasson, Samuel Neves, and Zooko Wilcox-O'Hearn.

Does any of my data leave my browser?

No. This page is fully client-side. Anything you type stays on your machine and is never sent to, stored on, or logged by a server.