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Hiromichi Yokoyama edited this page Oct 19, 2026 · 51 revisions

MoleditPy Wiki

MoleditPy 5 uses PySide6. Installer 4.x installs the same MoleditPy package on every OS and creates launchers and file associations. Update legacy PyQt6 plugins to their matching PySide6 releases.

English · 日本語

Draw molecules in 2D, generate and refine 3D coordinates, and export structures for computational chemistry. New users can start with installation; existing users can follow the illustrated tutorial.

Install MoleditPy and configure its launchers with these two lines. A virtual environment is optional when needed.

python -m pip install moleditpy-installer
python -m moleditpy_installer
I want to… Read…
Install MoleditPy Quick start
Try a complete workflow Your first molecule
Edit a geometry and hold a torsion 3D editing and constraints
Check a configuration R/S and E/Z
Choose an export format File formats
Fix a launch or conversion problem Troubleshooting

MoleditPy with a benzene drawing and generated 3D structure

From drawing to 3D using built-in tools. Follow the illustrated tutorial to reproduce this example.

Start here

Install and launch

Use the editor

Build and refine 3D structures

Plugins and help

Plugins and project resources

Author: HiroYokoyama. License: LGPL-3.0-or-later. Plugins are installed separately and are skipped in safe mode.

Security and plugin trust

Home / ホーム · 日本語

Start here / はじめに

Install and launch / インストールと起動

Use the editor / 基本操作とリファレンス

Build and refine 3D structures / 3D 構造の作成と編集

Plugins and help / プラグインと困ったとき

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