How to use: BLAKE3
BLAKE3 is a free online Hex Tools tool that hashes the input using BLAKE3 (UTF-8 encoded), with an optional key (also UTF-8), and outputs the result in hexadecimal format instantly in your browser. Paste your data, adjust the options and get the result in real time — no installation, no sign-up, and nothing is ever uploaded to a server.
Description
Hashes the input using BLAKE3 (UTF-8 encoded), with an optional key (also UTF-8), and outputs the result in hexadecimal format.
- Hex Tools
- Because everything is computed client-side, BLAKE3 is safe to use with sensitive data such as API keys, tokens or private logs.
How to use
Using BLAKE3 takes three steps:
- Paste your data into the input box (or load the example).
- Configure the options to match your target format or scenario.
- Copy, download or inspect the output — it updates live as you type.
Run
Use cases
Common situations where BLAKE3 helps:
- Hashes the input using BLAKE3 (UTF-8 encoded), with an optional key (also UTF-8), and outputs the result in hexadecimal format.
Parameters
This tool has no options — it works on the input alone.
FAQ
What is BLAKE3?
BLAKE3 hashes the input using BLAKE3 (UTF-8 encoded), with an optional key (also UTF-8), and outputs the result in hexadecimal format. It runs entirely in your browser, so your data stays private.
Is BLAKE3 free to use?
Yes. BLAKE3 is free, unlimited and works without registration or installation.
Does my data get uploaded?
No. All processing happens locally in your browser; nothing is sent to any server.
Good to know
- Everything runs client-side, so extremely large inputs are limited by your browser tab’s memory rather than by a server upload limit.
- The worked example below could not be pre-computed for this tool (threw: function is not iterable (cannot read property Symbol(Symbol.iterator))); the interactive tool above still works normally.