✓
Zasper Download

High-performance, resource-efficient IDE for Jupyter Notebooks supporting massive concurrency and multiple language kernels.

⭐ 2,272 stars on GitHub

Latest Release: v0.2.0-beta

About Software
About software content is created by automation system. If you want to complain, visit our complaint page.

Zasper is a high-performance Integrated Development Environment (IDE) specifically designed for Jupyter Notebooks. It differentiates itself by focusing on massive concurrency, minimal memory footprint, and exceptional speed compared to traditional tools like JupyterLab. Zasper implements Jupyter's wire protocol, ensuring compatibility with existing workflows while delivering up to 5x less CPU usage and 40x less RAM usage.

The IDE supports a wide range of kernels, including Python, R, Julia, Ruby, Go, and Javascript (Deno), and works seamlessly with Conda and UV environments. Available as both a web app and a desktop application for macOS, Linux, and Windows, Zasper provides a snappy and responsive coding experience for data scientists and researchers who demand efficiency and stability in their notebook environments.

Use Cases:

Edit and run Jupyter Notebooks with high performance and low latency
Handle massive concurrency for data science workflows
Manage multiple kernels (Python, R, Julia) in a single IDE
Visualize data and plots seamlessly within the notebook interface
Use as a lightweight alternative to JupyterLab with lower resource usage

Downloads

v0.2.0-beta June 10, 2025

zasper_0.2.0-beta_amd64_linux.debdeb

Download

zasper_0.2.0-beta_arm64_linux.AppImageAppImage

Download

zasper_0.2.0-beta_arm64_linux.debdeb

Download

zasper_0.2.0-beta_arm64_mac.dmgdmg

Download

zasper_0.2.0-beta_arm64_win.exeexe

Download

zasper_0.2.0-beta_x64_mac.dmgdmg

Download

zasper_0.2.0-beta_x86_64_linux.AppImageAppImage

Download

v0.1.0-alpha May 22, 2025

zasper_0.1.0-alpha_amd64_linux.debdeb

Download

zasper_0.1.0-alpha_arm64_linux.AppImageAppImage

Download

zasper_0.1.0-alpha_arm64_linux.debdeb

Download

zasper_0.1.0-alpha_arm64_mac.dmgdmg

Download

zasper_0.1.0-alpha_arm64_win.exeexe

Download

zasper_0.1.0-alpha_x64_mac.dmgdmg

Download

zasper_0.1.0-alpha_x86_64_linux.AppImageAppImage

Download

Package Info

Last Updated This date is from the latest scrape, not necessarily the repo’s own last update.: Jun 10, 2025
Latest Version: v0.2.0-beta
License: AGPL-3.0
Total Versions: 2

README

⚡ High Performance IDE 🚀 Massive concurrency 🐥  Inspired by Jupyter

Zasper is an IDE designed from the ground up to support massive concurrency. It provides a minimal memory footprint, exceptional speed, and the ability to handle numerous concurrent connections.

It implements Jupyter's wire protocol (https://jupyter-client.readthedocs.io/en/latest/messaging.html) and can efficiently run Jupyter Notebooks.

Cross Platform

✅ Fully supported: macOS & Linux

⚠️ Limited support: Windows — for the best experience, use via WSL

Benchmarks

How is Zasper better than JupyterLab ?

Up to 5X Less CPU usage
Up to 40X Less RAM usage
Higher throughput
Lower latency
Highly resilient under very high loads

Benchmark comparision report can be accessed here (https://github.com/zasper-io/zasper-benchmark?tab=readme-ov-file#benchmarking-zasper-vs-jupyterlab).

Jupyter Kernels Supported

Python Kernels
Conda environments
R kernels (iR) (https://github.com/IRkernel/IRkernel)
Julia Kernels (iJulia) (https://julialang.github.io/IJulia.jl/stable/)
Ruby kernels (iRuby) (https://github.com/SciRuby/iruby)
Javascript kernels (Deno) (https://docs.deno.com/runtime/reference/cli/jupyter/)
Go Kernels (GoNb (https://github.com/janpfeifer/gonb))
Compatible with all Jupyter kernels
Also works with UV. See the section on "Working with conda environments".

🚀 Installation

Zasper comes in two flavours:

Web App
Desktop App

Web App is available as Homebrew , snap and conda package.

HomeBrew

brew install zasper-io/tap/zasper

Snap

sudo snap install zasper

Conda

conda install zasper -c conda-forge

Desktop App

Visit our downloads page (https://zasper.io/downloads)

Or directly install from releases.

Releases

Current release version: v0.2.0-beta

OS	Web App	Desktop App
Mac 🍏 Silicon	✅	✅
Mac AMD 64	✅	✅
Debian AMD 64	✅	✅
Debian ARM 64	✅	✅
Debian i386	✅	✅
Redhat AMD 64	✅	✅
Redhat ARM 64	✅	✅
Redhat i386	✅	✅
Windows AMD 64	✅	❌
Windows ARM 64	✅	✅
Windows i386	✅	❌

The missing distributions will be out soon.

📷 Screenshots

Editor

!Editor (https://raw.githubusercontent.com/zasper-io/assets/refs/heads/main//editor.png)

Terminal

!Terminal (https://raw.githubusercontent.com/zasper-io/assets/refs/heads/main/terminal.png)

Launcher

!Launcher (https://raw.githubusercontent.com/zasper-io/assets/refs/heads/main/launcher.png)

Jupyter Notebook

!Notebook (https://raw.githubusercontent.com/zasper-io/assets/refs/heads/main/notebook.png)

Version Control

!Version Control (https://raw.githubusercontent.com/zasper-io/assets/refs/heads/main/git.png)

Command Palette

!Command Palette (https://raw.githubusercontent.com/zasper-io/assets/refs/heads/main/commandPalette.png)

Dark Mode

!Dark mode (https://raw.githubusercontent.com/zasper-io/assets/refs/heads/main/dark.png)

!Dark Notebook mode (https://raw.githubusercontent.com/zasper-io/assets/refs/heads/main/darkNotebook.png)

Architecture

!architecture

Quickstart

Webapp

Just launch Zasper from launcher.

Webapp

Once you have the webapp installed, Go to any directory you want to serve and run zasper. This starts zasper server in the directory.

prasunanand@Prasuns-Mac-mini example % zasper
==========================================================
     ███████╗ █████╗ ███████╗██████╗ ███████╗██████╗
     ╚══███╔╝██╔══██╗██╔════╝██╔══██╗██╔════╝██╔══██╗
       ███╔╝ ███████║███████╗██████╔╝█████╗  ██████╔╝
      ███╔╝  ██╔══██║╚════██║██╔═══╝ ██╔══╝  ██╔══██╗
     ███████╗██║  ██║███████║██║     ███████╗██║  ██║
     ╚══════╝╚═╝  ╚═╝╚══════╝╚═╝     ╚══════╝╚═╝  ╚═╝

<!-- truncated for display -->

See full README on repository.