This website is for version 5. You can find the documentation for version 4 here.

Vega-Altair: Declarative Visualization in Python#

Vega-Altair is a declarative visualization library for Python. Its simple, friendly and consistent API, built on top of the powerful Vega-Lite grammar, empowers you to spend less time writing code and more time exploring your data.

Getting Started

In the Getting Started section you can find installation instructions and a high-level overview of the main concepts.

Getting started
User Guide

Check out the User Guides for in-depth information on the key concepts of Vega-Altair.

User guide

The Examples gallery contains a selection of different visualizations which you can create with Vega-Altair.


The API reference guide contains detailed information on all of Vega-Altair’s methods and classes.


The Vega-Altair open-source project is not affiliated with Altair Engineering, Inc.