Making diffraction data analysis and modelling easy

An intuitive and user-friendly application which integrates multiple popular crystallographic libraries such as CrysPy, CrysFML and GSAS-II. Allowing for the simulation of diffraction patterns based on structural models and refinement against experimental data.

Version 0.8.1-beta (8 Jun 2021)


Free and open-source

Anyone is free to use easyDiffraction and the source code is openly shared on GitHub.


easyDiffraction works across operating systems: macOS, Windows, or Linux.

Easy to use

Intuitive tabbed interface with a clear workflow, built-in step-by-step user guides and video tutorials help speed up data modelling and analysis.

Everything is included

easyDiffraction is distributed as an all-in-one package that includes all the dependencies and can be installed with only a few clicks.


easyDiffraction integrates existing crystallographic libraries, such as CrysPy, CrysFML (experimental) and GSAS-II (experimental), to cover different functionality.

Various techniques

We started with 1D neutron powder diffraction at constant wavelength. Single-crystal, 2D, Time-of-Flight, and so on, will be added later.

Live update of calculations

You can modify any parameter manually or with a sidebar slider, and the simulated model curve is automatically recalculated in real time.

Human-readable syntax

Input/output files are in simple and human-readable data format STAR/CIF with the specifications of International Union of Crystallography, where possible.

Get in touch

General questions

For general questions or comments, please contact us at, or fill out the form.

Issues and new features

For bug reports and feature requests, please use GitHub Issue Tracker instead (free registration required).