BLAKE3 for Ruby. Uses a bundled copy of the C implementation from BLAKE3-team to minimize dependencies.


Add this line to your application's Gemfile:

gem 'digest-blake3'

And then execute:

$ bundle

Or install it yourself as:

$ gem install digest-blake3


Digest::BLAKE3 is implemented using the standard library's Digest wrapper, which gives you a broad API:

require 'digest/blake3'

# Compute a complete digest
Digest::BLAKE3.digest("input data") # returns binary data in a string

blake3 = Digest::BLAKE3.new
blake3.digest "input data"

# Other encoding formats
Digest::BLAKE3.hexdigest("input data")
Digest::BLAKE3.base64digest("input data")

# Compute digest by chunks
blake3 = Digest::BLAKE3.new
blake3 << " data"

# Compute digest for a file
blake3 = Digest::BLAKE3.file 'testfile'


  • blake3 gem by @Yamaguchi uses the original Rust implementation of BLAKE3. This supports even greater speed through multi-threaded hashing, but requires Rust and Cargo on the systems you install the gem on.


After checking out the repo, run bin/setup to install dependencies. Then, run bundle exec rake compile to compile the library and bundle exec rake test to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.


Bug reports and pull requests are welcome on GitHub at https://github.com/willbryant/digest-blake3.


The gem is available as open source under the terms of the MIT License.