A modern programming language that makes developers happier

Modern, concise and safe programming language

Easy to pick up, so you can create powerful applications immediately.

data class Employee(
   val name: String,
   val email: String,
   val company: String
) // + automatically generated equals(), hashCode(), toString(), and copy()

object MyCompany {                                // A singleton
   const val name: String = "MyCompany"
}

fun main() {                                      // Function at the top level
   val employee = Employee("Alice",               // No `new` keyword
      "alice@mycompany.com", MyCompany.name)
   println(employee)
}

A productive way to write server‑side applications

Compatible with the Java ecosystem. Use your favorite JVM frameworks and libraries.

Cross-platform layer for native applications

Share application logic between web, mobile, and desktop platforms while keeping an experience native to users.

Save time and get the benefit of unlimited access to features specific to these platforms.

Big, friendly and helpful
community

Kotlin has great support and many contributors in its fast-growing global community. Enjoy the benefits of a rich ecosystem with a wide range of community libraries. Help is never far away — consult extensive community resources or ask the Kotlin team directly.