Kotlin is a cross-platform statically typed general-purpose programming language with type inference. Kotlin is designed to interoperate fully with Java and the JVM version of its standard library depends on the Java Class Library but type inference allows its syntax to be more concise. Kotlin mainly targets the JVM but also compiles to JavaScript or native code (via LLVM). Kotlin is sponsored by JetBrains and Google through the Kotlin Foundation. Kotlin is officially supported and preferred by Google for mobile development on Android.

Features:
- Compile and run your program
- View program output or detailed error
- Advanced source code editor with syntax highlighting bracket completion and line numbers
- Open save import and share Kotlin files.
- Customize the editor

Limitations:
- Internet connection is required for compilation
- Maximum program running time is 20s
- Some file system network and graphics functions may be limited
- This is a batch compiler; interactive programs are not supported. For example if your program provides an input prompt enter the input in the Input tab prior to compilation.