Can I save my code in the Kotlin Playground?

There is no account system. Your code is encoded in the browser URL — copy and save the URL to preserve your work.

Does the Kotlin Playground work on mobile?

Yes, but the editor is easier to use on a desktop browser. For serious practice, IntelliJ IDEA or Android Studio gives a better experience.

Beginner 4 min readKotlin 2.0

Kotlin Playground — Run Kotlin in Your Browser

The Kotlin Playground is a free online environment to write and run Kotlin code in your browser. No installation required.

What You Will Learn

Navigate the Kotlin Playground
Run code and see output
Share code via URL
Choose Kotlin version

What is the Kotlin Playground?

The Kotlin Playground (play.kotlinlang.org) is an official online code editor by JetBrains. You can write and run Kotlin/JVM and Kotlin/JS code directly in your browser.

Running Code in the Playground

kotlin
fun main() {
    for (i in 1..5) {
        println("Line $i")
    }
}

Output

Line 1 Line 2 Line 3 Line 4 Line 5

Paste this into the playground and press Run (▶). The output appears in the panel below the editor.

Beginner Tip: Use Ctrl+Enter (Cmd+Enter on Mac) to run code without clicking the button.

Key Playground Features

1. **Version selector** — choose any Kotlin version 2. **Target selector** — JVM, JS, or Wasm 3. **Embedded examples** — built-in sample programs 4. **Shareable URL** — code is encoded in the URL for sharing 5. **Auto-complete** — basic IDE-style suggestions

The playground has a 10-second execution timeout. Infinite loops or very long computations will be stopped automatically.

Practice Exercise

Exercisemultiple choice

What keyboard shortcut runs code in the Kotlin Playground?

Quick Quiz

The Kotlin Playground is hosted by which company?

Kotlin Playground — Run Kotlin in Your Browser

What You Will Learn

What is the Kotlin Playground?

Running Code in the Playground

Key Playground Features

Practice Exercise

Quick Quiz

Frequently Asked Questions

Related Tutorials