The Kotlin Toolchain¶

A unified entry point into Kotlin. Build JVM, Android, iOS, multiplatform, and server-side applications with a simple declarative configuration.

Command Line¶

via SDKMAN

sdk install kotlintoolchain

or via installer script

macOS / Linux Windows

curl -fsSL https://kotl.in/install.sh | sh

powershell -ExecutionPolicy ByPass -c "irm 'https://kotl.in/install.ps1' | iex"

CLI documentation

IntelliJ IDEA¶

Install the Kotlin Toolchain plugin in IntelliJ IDEA 2026.1.2+

File → New → Project → Kotlin

New Kotlin project in IntelliJ IDEA

Get started User Guide Examples

Minimal Configuration¶

JVM ApplicationCompose Multiplatform

module.yaml

product: jvm/app

That's it. Toolchains, test framework, and everything you need — configured automatically.

iOS Android Desktop

ios-app/module.yaml

product: ios/app

dependencies:
  - ../shared

settings:
  compose: enabled

android-app/module.yaml

product: android/app

dependencies:
  - ../shared

settings:
  compose: enabled

desktop-app/module.yaml

product: jvm/app

dependencies:
  - ../shared

settings:
  compose: enabled

shared/module.yaml

# Produce a shared library for the JVM, Android, and iOS platforms:
product:
  type: kmp/lib
  platforms: [jvm, android, iosArm64, iosSimulatorArm64, iosX64]

# Shared Compose dependencies:
dependencies:
  - $compose.foundation: exported
  - $compose.material3: exported

# Android-only dependencies
dependencies@android:
  # Android-specific integration with Compose
  - androidx.activity:activity-compose:1.7.2: exported
  - androidx.appcompat:appcompat:1.6.1: exported

settings:
  # Enable Kotlin serialization
  kotlin:
    serialization: json

  # Enable the Compose Multiplatform framework
  compose: enabled