About

Scala Tutorials is an open-source collection of interactive Scala lessons that run entirely in your browser. It was created by Eran Medan in 2013 and modernized in 2026; the tour now targets Scala 3.

How the code runs

The live editor on tour pages is Scastie, the Scala Center’s official online playground. Your code is compiled and executed on Scastie’s servers: nothing to install, no account needed.

Historically the site ran on ScalaKata (and Codebrew before it) by Guillaume Massé and friends. Guillaume went on to create Scastie, so the site’s Run button has a fine pedigree.

Contributing

Spotted an error or want to add a lesson? The whole site is on GitHub; issues and pull requests welcome.

Other projects

Check out DepsGuard, a free CLI from Arnica that guards your dependencies (npm, pip, and more) against supply-chain attacks: malicious packages, typosquats, and compromised maintainers.