LSP Server

ktlsp

Kotlin Language Server (ktlsp) provides code intelligence for Kotlin and Java — diagnostics, go-to-definition, find references, and hover information for .kt, .kts, and .java files.

Kotlin

Java

backend

Requires Language Server Binary

This LSP server requires ktlspto be installed on your system. Make sure it's available in your PATH before enabling.

Add to Your Project

Copy this JSON into your .lsp.json to enable this server

Add to your .lsp.json or plugin.json:

{
  "lspServers": {
    "ktlsp": {
      "command": "ktlsp",
      "extensionToLanguage": {
        ".kt": "kotlin",
        ".kts": "kotlin",
        ".java": "java"
      }
    }
  }
}

Supported Languages

File extensions mapped to language identifiers

kotlin

.kt.kts

java

.java

Details

Server configuration and transport parameters

Commandktlsp

Transportstdio

Advanced Configuration

Initialization options and workspace settings

Startup Timeout:120000ms

Restart on Crash:Yes

Stats

LanguageRust

Parent stars26

MaintenanceGood

Last CommitJul 18, 2026

Actions

Plugins (1)

Stats

Actions