Freedom251 › Coding Playgrounds
Kotlin Playground
What Kotlin Playground is
Kotlin Playground is a free web application for writing, running, and sharing Kotlin code in a browser. Its editor highlights code and suggests completions as you type, and it automatically imports declarations from the Kotlin standard library and kotlinx.coroutines. You can choose among multiple Kotlin versions, including available previews, and run code on JVM, JavaScript, or JUnit backends. JavaScript options include legacy, IR, and Canvas; for JavaScript runs, the generated code can be viewed. Share code by copying a link or embedding a runnable snippet in another website or a Medium article. Kotlin’s community page points users to Slack for questions and an issue tracker for feedback and bug reports. The Kotlin community site says the language is supported and developed by JetBrains and licensed under Apache 2. JetBrains lists its headquarters in Amsterdam and says it was founded in February 2000.
Who it suits
It suits learners and developers who want to write or run Kotlin code in a browser, try different Kotlin versions, or share runnable examples. It is also useful for checking JavaScript output from supported backends.
What it does well
- Free plan; core use needs no paid tier.
- Code highlighting and completion as you type.
- Choose among multiple Kotlin versions.
- Run on JVM, JavaScript, or JUnit backends.
- Share links or embed runnable snippets.
What to know first
- Web platform only.
- No deployment options are listed.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Free plan | Free to use · no paid tier required for core use (third-party listing) | Free |
As play.kotlinlang.org lists them, read 11 Oct 2026. The maker's own page has the final word.
Verdict
Kotlin Playground provides a browser-based place to explore and share Kotlin code, with several execution backends and version choices.
Facts from Kotlin Playground's own pages
- Automatic imports
- The Playground automatically imports declarations from the Kotlin standard library and kotlinx.coroutines. · kotlinlang.org, 11 Oct 2026
- Deployment options
- none · play.kotlinlang.org, 22 Sept 2026
- Developer
- The Kotlin community site says Kotlin is supported and developed by JetBrains. · kotlinlang.org, 11 Oct 2026
- Editor
- The editor supports code highlighting and code completion as you type. · kotlinlang.org, 11 Oct 2026
- Execution backends
- The Playground runs code on JVM, JavaScript (legacy, IR, or Canvas), and JUnit backends. · kotlinlang.org, 11 Oct 2026
- Free plan
- Yes · play.kotlinlang.org, 22 Sept 2026
- Full-stack runtime
- No · play.kotlinlang.org, 22 Sept 2026
- JavaScript output
- For JavaScript backends, users can view the generated JavaScript code. · kotlinlang.org, 11 Oct 2026
- Kotlin versions
- Users can select multiple Kotlin versions, including available previews of future versions. · kotlinlang.org, 11 Oct 2026
- License
- The Kotlin community site says Kotlin is licensed under the Apache 2 license. · kotlinlang.org, 11 Oct 2026
- Maker founded
- JetBrains says it was founded in February 2000. · jetbrains.com, 11 Oct 2026
- Maker headquarters
- JetBrains lists its headquarters in Amsterdam, the Netherlands. · jetbrains.com, 11 Oct 2026
- Purpose
- Kotlin Playground is an online application for writing, running, and sharing Kotlin code in a browser. · kotlinlang.org, 11 Oct 2026
- Sharing controls
- link_access · play.kotlinlang.org, 22 Sept 2026
- Sharing
- Users can copy a link to share code or embed runnable code snippets in other websites and Medium articles. · kotlinlang.org, 11 Oct 2026
- Support
- Kotlin's community page lists Slack for questions and an issue tracker for feedback and bug reports. · kotlinlang.org, 11 Oct 2026
Where Kotlin Playground stands on Freedom251
- Coding Playgrounds#53 of 138
- Code Playground Software#27 of 58