⚠️ This extension is currently in the Alpha state ⚠️
The core implementation and overall architecture are mostly settled and stable.
Upcoming releases will focus on feature completeness and stability of the existing functionality.
Quick Start
Install the extension in Visual Studio Code.
Open a folder with a Kotlin JVM Gradle or Maven project.
Open any .kt file to activate the extension and language server.
Important: If you already have a "Kotlin by JetBrains" extension installed from GitHub, a dialog will offer to uninstall it.
Accept it and reload the window — the new jetbrains.kotlin-server extension cannot properly activate while the old jetbrains.kotlin
extension is present.
Wait for project import and indexing to complete.
After that, you can start using the extension's features!
Supported Features
Up-to-date Kotlin language versions support
IntelliJ-powered code completion and signature help
IntelliJ-powered diagnostics, inspections, and quick fixes for Kotlin and kotlinx libraries
Build system support for JVM projects: Gradle, Maven, experimental Android Gradle Plugin support
Support for Kotlin Multiplatform (KMP) projects is coming in the future releases.
Semantic highlighting
Inlay hints for types and parameter names
Navigation: definition, references, type definition, and implementation
Call Hierarchy
Document and workspace symbols
Documentation navigation and hover support
Organize imports
Rename refactoring
Code formatting
Code Folding
File templates for creating new Kotlin files
Configuration
The extension provides a number of VS Code configuration options to customize its behavior, including:
jetbrains.kotlin.hints.* to configure inlay hints
jetbrains.templates.kotlin.* to customize Kotlin file templates
intellij.buildTool to prefer a specific project importer (e.g., maven or gradle)
Feedback and Issues
The best way to provide feedback or report an issue is to file a bug in GitHub issues.
