Kotlin Help

Get started with Kotlin

Kotlin is a modern but already mature programming language aimed to make developers happier. It’s concise, safe, interoperable with Java and other languages, and provides many ways to reuse code between multiple platforms for productive programming.

Pick it up to start building powerful applications!

Learn Kotlin fundamentals

  • If you're already familiar with one or more programming languages and want to learn Kotlin, start with these Kotlin learning materials.

  • If you are at the very beginning and Kotlin is your first programming language, you can start with reading the Atomic Kotlin book or finding a Kotlin course.

Create your powerful application with Kotlin

Here is how you can take the first steps in developing Kotlin server-side applications.

  1. Install the latest version of IntelliJ IDEA.

  2. Create your first backend application:

    SpringKtor
    A mature family of frameworks with an established ecosystem that is used by millions of developers worldwide.
    A lightweight framework for those who value freedom in making architectural decisions.
  3. Use Kotlin and third-party libraries in your application. Learn more about adding library and tool dependencies to your project.

  4. Learn more about Kotlin for server-side:

  5. Join the Kotlin server-side community:

  6. Follow Kotlin on Twitter Twitter, Reddit Reddit, and YouTube Youtube, and don't miss any important ecosystem updates.

If you've encountered any difficulties or problems, report an issue to our issue tracker.

Here you'll learn how to develop and improve your cross-platform mobile application using Kotlin Multiplatform Mobile (KMM).

  1. Set up your environment for cross-platform development.

  2. Create your first KMM application:

  3. Use a wide set of multiplatform libraries to implement the required business logic only once in the shared module. Learn more about adding dependencies.

    LibraryDetails
    KtorDocs and sample.
    SerializationDocs and sample.
    CoroutinesDocs and sample.
    DateTimeDocs.
    SQLDelightThird-party library. Docs and sample.
  4. Learn more about KMM:

  5. Join the Kotlin Multiplatform community:

  6. Follow Kotlin on Twitter Twitter, Reddit Reddit, and YouTube Youtube, and don't miss any important ecosystem updates.

If you've encountered any difficulties or problems, report an issue to our issue tracker.

Kotlin provides an ability to transpile your Kotlin code, the Kotlin standard library, and any compatible dependencies to JavaScript.

Here you'll learn how to develop and improve your frontend web application using Kotlin/JS.

  1. Install the latest version of IntelliJ IDEA.

  2. Create your first frontend web application:

  3. Use libraries in your application. Learn more about adding dependencies.

    LibraryDetails
    stdlibThe Kotlin standard library included in all projects by default.
    kotlinx.browserThe Kotlin library for accessing browser-specific functionality, including typical top-level objects such as document and window.
    kotlinx.htmlThe Kotlin library for generating DOM elements using statically-typed HTML builders.
    KtorThe Kotlin multiplatform library for networking.
    KVisionA third-party object-oriented web framework for Kotlin/JS.
    fritz2A third-party lightweight, high-performance, independent library for building reactive web apps in Kotlin that are heavily dependent on coroutines and flows.
    DoodleA third-party vector-based UI framework that uses browser's capabilities to draw user interfaces.
    Compose for WebBrings Google’s Jetpack Compose UI toolkit to the browser. A Technology Preview is currently available.
    kotlin-wrappersProvide convenient abstractions and deep integrations for one of the most popular JavaScript frameworks. Kotlin wrappers also provide support for a number of adjacent technologies like react-redux, react-router, or styled-components.
  4. Learn more about Kotlin for frontend web development:

  5. Join the Kotlin frontend web community:

  6. Follow Kotlin on Twitter Twitter, Reddit Reddit, and YouTube Youtube, and don't miss any important ecosystem updates.

If you've encountered any difficulties or problems, report an issue to our issue tracker.

Follow Kotlin on Twitter Twitter, Reddit Reddit, and YouTube Youtube, and don't miss any important ecosystem updates.

Support for multiplatform programming is one of Kotlin’s key benefits. It reduces time spent writing and maintaining the same code for different platforms while retaining the flexibility and benefits of native programming.

Here you'll learn how to develop and publish a multiplatform library:

  1. Install the latest version of IntelliJ IDEA.

  2. Create a multiplaform library:

  3. Use libraries in your application. Learn more about adding dependencies on libraries.

    LibraryDetails
    KtorDocs and sample.
    SerializationDocs and sample.
    CoroutinesDocs.
    DateTimeDocs.
  4. Learn more about Kotlin Multiplatform programming:

  5. Join the Kotlin Multiplatform community:

  6. Follow Kotlin on Twitter Twitter, Reddit Reddit, and YouTube Youtube, and don't miss any important ecosystem updates.

If you've encountered any difficulties or problems, report an issue to our issue tracker.

Is anything missing?

If anything is missing or seems confusing on this page, please share your feedback.

Last modified: 28 May 2021