Working with Crystal Online

If you’d like to take Crystal for a test drive before installing it, you can use the online version of Crystal playground^[120] for your preferred browser. This is effectively a sandbox in the cloud—a web service that compiles your code, runs it, and displays the result. It provides an edit screen with a “Compile & run code” button:

This takes you to an output screen. From here, you can save the source in a local file:

Tio^[121] offers another fun way to run Crystal online.