nbdime (Jupyter Notebook Diff & Merge)

nbdime provides tools for diffing and merging Jupyter Notebooks. It offers both a command-line interface for integration with version control systems (like Git) and a visual, interactive web interface for richer diffs and merges. The library is currently at version 4.0.4 and is actively maintained by the Project Jupyter team, with releases often coinciding with major JupyterLab updates.