MD-Tracks is a trajectory analysis toolkit for molecular dynamics and Monte Carlo simulations. It is designed to interact with several simulation codes that generate trajectory data: CP2K, CPMD, DLPOLY, GROMACS, LAMMPS. The trajectory output files are first converted into a in a uniform binary format, which can then be processed with a bundle of analysis scripts, e.g. for the analysis of vibrational spectra, diffusion constants, radial distribution functions, and so on.