Best IDEs and Tools for Kotlin Development: A Complete Guide

Best IDEs and Tools for Kotlin Development: From A to Z

Kotlin is a modern, concise, and safe programming language that is rapidly gaining popularity. Thanks to full compatibility with Java and powerful support from JetBrains, Kotlin has become the official language for Android development and is actively used in backend, web, and even data science. However, to unlock the full potential of this language, you need to choose the right toolkit. In this article, we will review the best IDEs and tools for Kotlin development — from powerful environments to useful utilities and frameworks.

1. Best IDEs for Kotlin

Choosing the right development environment is the foundation of productive work. Let's look at three main options.

1.1. IntelliJ IDEA — The Gold Standard for Kotlin

IntelliJ IDEA from JetBrains is the native environment for Kotlin. The language developers themselves created this IDE, so the integration is flawless. You get:

• Smart autocompletions that understand Kotlin specifics (null-safety, extension functions).
• Powerful refactoring — renaming, extracting variables, converting Java to Kotlin.
• Built-in templates for creating projects (Kotlin/JVM, Kotlin/JS, Kotlin/Native, Android).
• Code inspections that find potential errors and suggest idiomatic solutions.

For most projects, the free Community Edition is sufficient. If you work with enterprise Java/Kotlin projects (Spring, Jakarta EE), you will need the Ultimate version.

// Example: IntelliJ IDEA will highlight the error and suggest a fixfun main() {    val name: String? = null    // IDE will suggest: use safe call '?.' or Elvis operator '?:'    println(name?.length ?: "Name not provided") }

1.2. Android Studio — For Mobile Development

Android Studio is the official IDE for Android, built on IntelliJ IDEA. If your goal is mobile applications, this is the best choice. In addition to all IntelliJ features, it includes:

• Visual layout editor (Compose and XML).
• Profiler (CPU, memory, network).
• Android emulator with fast startup.
• Integration with Firebase and Google Play.

Android Studio fully supports Kotlin and Jetpack Compose. With each update, Google and JetBrains improve performance and add new templates.

1.3. VS Code — A Lightweight Alternative

Visual Studio Code is a fast editor that, with extensions, turns into a full-fledged IDE. For Kotlin, you will need:

• Kotlin Language (by mathiasfrohlich) — syntax highlighting, autocompletion, navigation.
• Kotlin IDE (by fwcd) — refactoring, formatting, Gradle support.
• Code Runner — for quickly running scripts.

VS Code is suitable for small projects, learning the language, or writing scripts. However, for large enterprise projects, IntelliJ IDEA remains preferable due to its deeper code analysis.

2. Key Tools and Utilities

Beyond IDEs, the Kotlin ecosystem has many useful tools that speed up development and improve code quality.

2.1. Build Systems: Gradle and Maven

Gradle is the de facto standard for Kotlin projects. It uses Kotlin DSL for writing build scripts, making them readable and type-safe.

// build.gradle.kts (Kotlin DSL)plugins {    kotlin("jvm") version "1.9.22"    application}

application {    mainClass.set("MainKt")}

dependencies {    implementation(kotlin("stdlib"))    // Adding a library