🤖 Kotlin Playground

Write Kotlin code below and click Run. Everything runs in your browser — nothing is sent to our servers. No signup, no install, no nonsense.

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🤖

Kotlin can't run inline (yet)

Some languages need a real compiler or runtime that doesn't fit in a browser. But you can run Kotlin instantly on these free platforms:

Open in Replit ↗ Open in OneCompiler ↗

Sample Kotlin code:

Kotlin example

// Android compose UI
@Composable
fun Greeting(name: String) {
    Text(
        text = "Hello, $name!",
        fontSize = 24.sp,
        color = Color.Blue
    )
}

Try these Kotlin examples

Click any example to load it into the editor:

A note on this playground

Code runs in your browser using open-source engines (Pyodide for Python, native JS for JavaScript, AlaSQL for SQL). Nothing is sent to OneCity's servers. No accounts, no tracking. If you save your work, copy-paste it somewhere else — refreshing the page resets the editor.