Zasper – Lightweight IDE for Jupyter Notebooks

Zasper is an integrated development environment designed for working with Jupyter notebooks. It focuses on responsive performance, low resource consumption, and efficient handling of multiple concurrent notebook sessions.

The application uses the Jupyter communication protocol and works with existing Jupyter kernels. It reads and writes standard .ipynb notebook files, allowing users to work with notebooks created in JupyterLab without converting them to a different format.

Zasper provides a browser-based interface that can run on a local machine or be accessed from a self-hosted server. It combines notebook editing with conventional development tools, making it suitable for data exploration, scientific computing, and interactive programming.

The environment also integrates external coding agents, enabling users to delegate notebook operations while reviewing the resulting changes.

This is free and open source software.

Key Features

• Jupyter compatibility – open, edit, execute, and save standard notebook files using existing Jupyter kernels.
• Concurrent execution – manage numerous kernel connections with an architecture designed for low memory and CPU consumption.
• Rich notebook output – display interactive widgets, Plotly charts, HTML, Markdown, and LaTeX content.
• Kernel management – discover available kernels and development environments when creating notebooks.
• Data exploration – inspect kernel variables and work with DataFrames in sortable, filterable tables and charts.
• SQL cells – execute database queries and return their results as DataFrames.
• Integrated editor – edit source files alongside notebooks, with language-server features such as completion and navigation.
• Built-in terminal – work with system shells without leaving the development environment.
• Git integration – stage and commit changes, manage branches, and inspect notebook differences cell by cell.
• Coding agent integration – connect compatible external agents to read, edit, and execute notebook cells, with review and undo controls.
• Persistent execution – retain notebook execution results even when a browser tab is closed.
• Command palette – search files and execute commands from a unified interface.
• Security controls – trusted folders restrict code execution, while self-hosted sessions use access tokens.
• Interface customisation – light and dark themes, adjustable zoom, and workspace controls.
• Cross-platform support – runs on Linux, macOS, and Windows.

Website: github.com/zasper-io/zasper
Support:
Developer: Prasun Anand
License: GNU Affero General Public License v3.0

Zasper is written in Go. Learn Go with our recommended free books and free tutorials.

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