A third-party Deepnote extension for JupyterLab that provides a read‑only viewer for Deepnote .deepnote files.

Note: This is an unofficial, community-developed extension and is not affiliated with or endorsed by Project Jupyter. JupyterLab is a trademark of LF Charities, Inc.

• Python 3.9 or higher
• JupyterLab >= 4.4.0, < 5.0.0

Install the extension using pip:

pip install jupyterlab_deepnote

After installation you can:

• Open Deepnote files (.deepnote) containing Deepnote projects in JupyterLab
• Switch between notebooks inside a .deepnote file
• View content in read‑only mode (no editing or saving back to the .deepnote file)

If you encounter issues with the extension, verify that both the server and frontend extensions are properly installed and enabled.

Check server extensions:

jupyter server extension list

Check frontend extensions:

jupyter labextension list

To remove the extension, run:

pip uninstall jupyterlab_deepnote

This extension is compatible with JupyterLab 4.4.0 or higher. It requires the content provider registry API introduced in JupyterLab 4.4.

Upper bound: The extension sets an upper bound of < 5.0.0 to prevent automatic installation with potentially incompatible future major versions of JupyterLab.

Following JupyterLab's extension development guidelines, we adhere to semantic versioning principles:

• Major releases (e.g., 1.0.0 → 2.0.0): May introduce breaking changes and require user action
• Minor releases (e.g., 1.0.0 → 1.1.0): Add new features while maintaining backwards compatibility
• Patch releases (e.g., 1.0.0 → 1.0.1): Bug fixes and minor improvements only

When JupyterLab 5.x is released, we will:

1. Evaluate the changes and update the extension as needed
2. Release a new major or minor version with explicit JupyterLab 5.x support
3. Clearly document any breaking changes in the changelog

This extension follows semantic versioning for its own API:

• Current version (0.x.x): Pre-release phase. APIs may change without prior notice.
• Version 1.0.0 onwards: We will maintain backwards compatibility within major versions and clearly document breaking changes between major versions.

Note: This extension does not support JupyterLab 3.x or earlier versions.

Contributions are welcome! Please see CONTRIBUTING.md for guidelines on how to contribute to this project.