Crystal JavaScript CSS HTML
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Cannot retrieve the latest commit at this time. - Compile and run code in

A web service that runs your code and displays the result.

Consists of:

  • Frontend (a ember-cli app)
  • Backend API server (written in Crystal)
  • Sandbox manager (designed for Archlinux host with a BTRFS filesystem available, written in Crystal)

Supported languages

  • Crystal
  • Ruby
  • C (GCC)


  1. Fork it ( )
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Commit your changes (git commit -am 'Add some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Create a new Pull Request