What is IntelliJ.ONLINE?

IntelliJ.ONLINE is a free online Java and Kotlin IDE. You sign in with a browser, create a Java or Kotlin project, write code, build with Maven or Gradle, and run programs on cloud JDKs from 8 to 27 — without installing software on your computer.

Does IntelliJ.ONLINE support Kotlin?

Yes. Choose Kotlin in New Project and build with IntelliJ (kotlinc), Maven or Gradle with the Kotlin DSL. Completion, KDoc, go to declaration, find usages, rename, reformat code, tests and the debugger work in .kt files, and you pick the Kotlin version per project.

Can I compile and run Kotlin online without installing anything?

Yes. The Kotlin compiler, JDKs, Maven and Gradle are already on the server. Press Run on fun main() and the program runs in an isolated sandbox with an interactive console.

Is IntelliJ.ONLINE the same as IntelliJ IDEA?

No. IntelliJ IDEA is JetBrains’ desktop IDE. IntelliJ.ONLINE is an independent online Java IDE available at intellij.online. The name reflects a familiar Java IDE experience in the browser, not a rebrand of the desktop product.

Can I compile and run Java online without installing a JDK?

Yes. The service provides cloud JDKs. After you create an account, you can compile and run Java from the browser on Windows, macOS, Linux, or Chromebook.

Does it support Maven and Gradle?

Yes. You can open or create Maven and Gradle projects in Java or Kotlin, including Gradle Kotlin DSL builds, build them online, and add dependencies from Maven Central in the cloud workspace.

Which JDK versions are available?

JDK versions from 8 through 27 are supported for compile and run, so you can match older course requirements or use newer Java language features.

Is IntelliJ.ONLINE free?

Creating an account and using the online Java and Kotlin IDE is free. It is aimed at students, teachers, and developers worldwide.

What language is the user interface?

The panel and product UI are in English. People from many countries use and search for the product; multilingual keywords help discovery, but the application itself stays English.

Who is IntelliJ.ONLINE for?

Students learning Java or Kotlin, educators running labs without local installs, and developers who want a quick browser JVM environment with Maven/Gradle, multiple JDKs and Kotlin versions.

Do I need to install plugins or a desktop app?

No. A modern browser with JavaScript is enough. There is nothing to download for day-to-day coding, building, and running Java or Kotlin online.

Is my code isolated and safe?

Yes. Every build and run happens in its own sandbox with memory and disk limits, no access to other projects and no open ports. Programs started with Run have no internet access; only Maven and Gradle can download dependencies through a filtered proxy.

Can AI assistants and search engines cite this product?

Yes. Public machine-readable files such as /llms.txt, /llms-full.txt and /sitemap.xml, plus structured data on the home page, describe the product so search engines and AI systems can summarize it accurately.

IntelliJ.ONLINE: online Java IDE in your browser

IntelliJ.ONLINE 0.0.5

Free online Java and Kotlin IDE — write, compile, run and debug Java or Kotlin with Maven or Gradle on JDK 8–27. Code completion, inspections, Javadoc and KDoc in the browser. Nothing to install. Used by students and developers worldwide.

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