Zenify is a tiny Ruby utility gem that normalizes whitespace in strings.

It is especially useful when dealing with Japanese text, as it converts full-width spaces (全角スペース) into normal spaces and collapses consecutive whitespace into a single space.

• Ruby 3.2 or later

Zenify is continuously tested against the following Ruby versions via CI:

• Ruby 3.2
• Ruby 3.3
• Ruby 3.4
• Ruby 4.0
• This project is tested on Ruby 3.2–4.0 using GitHub Actions.

Add this line to your application's Gemfile:

gem "zenify"

And then execute:

bundle install

Or install it yourself as:

gem install zenify

require "zenify"

Zenify.normalize_spaces("  a　 b   ")
# => "a b"

Zenify.normalize_spaces("　こんにちは　　世界　")
# => "こんにちは 世界"

You can also use Zenify from the command line:

zenify "  a　 b   "
# => a b

echo "  a　 b   " | zenify
# => a b

# trailing spaces preserved
zenify --no-strip "  a　 b   "
# =>  a b

zenify --help
zenify --version

After checking out the repo, run:

bin/setup

Then run the tests:

bundle exec rake test

You can also experiment in an interactive console:

bin/console

To install this gem onto your local machine:

bundle exec rake install

Bug reports and pull requests are welcome on GitHub:

https://github.com/ryu/zenify

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