Jupyter Notebook is the original web application of Project Jupyter for creating and sharing computational documents: notebooks that place code, explanatory text, formulas and visualisations side by side. Data specialists, researchers and teachers use it for data analysis, teaching and reproducible research, with kernels for many programming languages. It is delivered as software that you install yourself, for example with pip, and open in your browser.
Project Jupyter is developed by a community and is hosted by LF Charities, a US non-profit organisation. Its governance documentation is published from the United States. The code is released under the BSD-3-Clause licence. Because you run Jupyter Notebook on your own laptop or server, notebooks and data stay with you; no cloud service from the project is required. A recent version, 7.6.3, was published in September 2026.