Kotlin Notebook downloads statistics

Please note: Starting with v2026.2, JetBrains will sunset Kotlin Notebook as a product and will no longer maintain it. Kotlin Notebook will be unbundled from IntelliJ IDEA and continue as an open-source, community-driven project hosted on GitHub.

Kotlin notebooks are interactive worksheets with rich outputs that allow you to explore and experiment with your Kotlin code without additional environment setup. The Kotlin Notebook plugin is a client for the Kotlin Jupyter kernel that enables you to create and edit notebooks directly within IntelliJ IDEA. There are other clients that support Kotlin notebooks, including Datalore, Jupyter Notebook, and JupyterLab.

The plugin comes with various features that are available in ordinary Kotlin files in the IDE, as well as additional Kotlin notebook-specific extensions. These include enhanced syntax highlighting, inlay hints, inspections, find usages, and refactorings, all of which help you write Kotlin code more efficiently. Many features are state-aware, meaning that finding usages or renaming will consider your current definitions and loaded libraries.

Notebooks have two key distinguishing features compared to regular REPLs. Firstly, they allow you to save the entire session to a file, preserving both the code and the execution results. Secondly, the execution results can include more than just plain text; they can also encompass images in various formats, arbitrary HTML (including JavaScript and CSS), and even specifications for Swing outputs that are rendered directly within IntelliJ IDEA. To learn more about the diverse range of outputs and their rendering, please refer to this link. Additionally, there is a sample notebook, showcasing different types of outputs.

With the Kotlin Notebook plugin, you can add binary dependencies from a remote Maven repository or a local one. For this, use @file:DependsOn annotation or Gradle-like syntax. Some libraries have special notebook integrations and can be imported with the %use line magic that comes with code insights to help you choose the correct library version. You can create a library descriptor or an integration for any library using this guide. Integrations allow libraries to have rich outputs, add default imports, provide reflection-based code generation, and more.

You can also use notebooks to explore the code in your current project – sources and binary dependencies can easily be added to the notebook context. To set this up or to adjust the Kotlin Notebook plugin appearance, use the following navigation in the IDE:

File -> Settings... -> Tools -> Kotlin Notebook

To learn more about using Kotlin notebooks, check out the Kotlin Jupyter kernel documentation. If you have any questions or want to connect with other Kotlin developers who use notebooks, join the #notebooks channel in the Kotlin Slack. To file an issue, use Kotlin Notebook YouTrack. Stay tuned!