Kotlin

Concise. Multiplatform. Fun.

Get started

Kotlin, developed by JetBrains.

Latest news

August 8, 2024

Kotlin Roundup: Ktor in Focus

Welcome to this special edition of Kotlin Roundup, where we shine the spotlight on Ktor, our framework for building asynchronous servers and clients in connected systems! This issue is packed with the latest updates, insightful news, and exciting developments in the Ktor ecosystem, appealing to everyone from seasoned Ktor enthusiasts to those just getting started. […]

August 8, 2024

Amper Update August 2024 – Standalone Projects, Settings Tracing, and More

The latest release of Amper, version 0.4.0, is now available! In this release, we’re introducing a clear definition for the project root and providing a first look at settings tracing in Amper, alongside bug fixes and other improvements. To get support for Amper’s latest features, use Fleet 1.38 and IntelliJ IDEA 2024.2 (or later versions). […]

July 31, 2024

KotlinConf 2025 Tickets Are Now on Sale!

The countdown to KotlinConf 2025 has officially begun, and we’re excited to announce that tickets are now on sale for this premier event, which will take place from May 21–23, 2025, in Copenhagen, Denmark! Organized by JetBrains, this is the largest Kotlin event in the world. Starting today, you can secure your spot at KotlinConf […]

July 9, 2024

Enhanced Column Selection DSL in Kotlin DataFrame

Introduction The Kotlin DataFrame library makes extracting values from structured data an easy task. As discussed in our documentation, there are four separate APIs that can be used for this purpose, with the optimal choice depending on your individual situation and requirements. To demonstrate, let’s read in a JSON document containing information about users: The […]

Kotlin blog

Why Kotlin?

fun main() {
    val name = "stranger"        // Declare your first variable
    println("Hi, $name!")        // ...and use it!
    print("Current count:")
    for (i in 0..10) {           // Loop over a range from 0 to 10
        print(" $i")
    }
}

Get started

Kotlin in action

McDonald's leverages Kotlin Multiplatform (KMP) for their global mobile app, enabling them to build a codebase that can be shared across platforms, removing the need for codebase redundancies.Kotlin Multiplatform

AWS opted for Kotlin over Java for Amazon Quantum Ledger Database (QLDB) thanks to its expressiveness and structured concurrency. They rewrote QLDB in Kotlin, enhancing the user experience, benefiting from its development workflow, and adopting it fully for server-side development.Server-side

Philips utilizes Kotlin Multiplatform in its HealthSuite digital platform mobile SDK. With KMP, they accelerated the implementation of new features and fostered increased collaboration between Android and iOS developers.Kotlin Multiplatform

Adobe Experience Platform chose Kotlin for server-side development because of its concise syntax, async capabilities, and interoperability with Java. This shift boosted productivity and improved the developer experience, replacing Java for real-time services.Server-side

By sharing over 80% of logic across iOS and Android, Forbes now rolls out new features simultaneously on both platforms, keeping the flexibility to withhold or customize features based on the specific platform.Kotlin Multiplatform

Atlassian adopted Kotlin for the Jira Software cloud, leveraging its Java compatibility for seamless integration and minimizing migration challenges. Kotlin's ease of use improved developer productivity and boosted team satisfaction and efficiency.Server-side

Share code on your terms and for different platforms

Simplify the development of cross-platform projects with Kotlin Multiplatform. It reduces time spent writing and maintaining the same code for different platforms while retaining the flexibility and benefits of native programming. Kotlin applications will work on different operating systems, such as iOS, Android, macOS, Windows, Linux, watchOS, and others.

Learn about Kotlin Multiplatform

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.

Kotlin Foundation

Actively supports community efforts in developing the Kotlin ecosystem.

Learn more

Start using Kotlin today!

Get started