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oxDNA is a simulation code originally developed to implement the coarse-grained DNA model introduced by T. E. Ouldridge, J. P. K. Doye and A. A. Louis. It has been since reworked and it is now an extensible simulation+analysis framework. It natively supports DNA (oxDNA model), RNA (oxRNA model), Lennard-Jones and patchy particle simulations on both CPUs and NVIDIA GPUs.

The code implements Monte Carlo and Molecular Dynamics and can be used as a basis to numerically study DNA, RNA, Lennard-Jones and patchy particle systems. The developers are L. Rovigatti, F. Romano, P. Šulc, B. Snodin, F. Randisi and T. E. Ouldridge in the Doye and Louis groups at the University of Oxford. Additionally, Molecular Dynamics simulations modeling DNA-linked nanoparticles have been implemented by J. Hendricks, T. Fochtman, and B. Walcutt in the Patitz group at the University of Arkansas.

The oxDNA and oxRNA models are intended to provide a physical representation of the thermodynamic and mechanical properties of single- and double-stranded DNA and RNA, as well as the transition between the two. At the same time, the representation of DNA and RNA is sufficiently simple to allow access to assembly processes which occur on long timescales, beyond the reach of atomistic simulations. Basic examples include duplex formation from single strands, and the folding of a self-complementary single strand into a hairpin. These are the underlying processes of the fast-growing field of DNA nanotechnology and RNA nanotechnology, as well as many biophysical uses of DNA/RNA, allowing the model to be used to understand these fascinating systems.


  • Code implementing oxDNA2, a new version of the oxDNA model, is now included in the latest release. See the recent arXiv publication [1] for more information about the new model.
  • Follow the latest updates about oxDNA on our twitter account: ox_dna
  • You can post questions about the installation and usage of our code to the newly created Discussion forum for oxDNA at


We thank our co-workers C. Matek, R. Harrison and W. Smith for having contributed bits of code and/or material for the examples and our webmasters Russell Jones and Greg Agacinski for maintaining the website.