Avogadro is an advanced free and open source molecular editor and visualization tool.

It is highly capable and designed for use in computational chemistry, molecular modeling, chemistry education, bioinformatics, materials science, and related areas.

It offers flexible high-quality rendering, a modern UI with native styling, and a powerful plugin architecture.

Avogadro is designed for cross-platform use and is fully supported on Windows, Linux, and macOS.

Flexible

Designed for students and advanced researchers alike.

Used in computational chemistry, molecular modeling, chemistry education, bioinformatics, materials science, and more.

Molecules, crystals, biomolecules, surfaces – Avogadro loves them all.

Intuitive

A sleek interface and user-friendly tools makes working in Avogadro easy, whether you are playing with molecules in 3D for the first time, quickly sketching structures for calculation input, or preparing graphics for publication.

Beautiful

With a new, modern 3D renderer, visual effects like reflections and ambient occlusion, and a variety of display options, your molecules look good in Avogadro.

A picture paints a thousand words, but a movie tells a story – make an animation to bring your chemistry to life.

Fast

Thanks to the rewritten core and lightning-quick multithreaded renderer, Avogadro 2 handles systems of thousands of atoms effortlessly.

Built-in force fields tidy up hand-drawn molecules in seconds.

Compatible

Read your geometry files, wherever they are from – Avogadro understands a huge number of file formats, and can write to hundreds.

Explore the results of calculations with native output parsing for popular quantum chemistry programs including GAMESS, Gaussian, Molden, MOPAC, NWChem, and ORCA.

Extensible

Plugins add diverse functionality – interactive tools, commands, interfaces to other programs, additional force fields and file formats, and more.

Writing your own plugin in Python is straightforward. And if it’s useful, why not share it with the community?