EasySpin is an open-source MATLAB toolbox for simulating and fitting a wide range of Electron Paramagnetic Resonance (EPR) spectra. It supplements the numerical and visualization power of MATLAB with the best computational methods devised by EPR spectroscopists.

EasySpin runs on Windows, Linux and Mac, and is available free of charge.

Get current stable version (5.2.36)

Get current development version (6.0.0-dev.54)

EasySpin was developed with support from the U.S. National Science Foundation, the U.S. National Institutes of Health, the Swiss National Science Foundation, and MathWorks.