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GalCraft creates mock integral-field spectroscopic (IFS) observations of the Milky Way and other hydrodynamical/N-body simulations. It conducts all the procedures from inputting data and spectral templates to the output of IFS data cubes in FITS format. The produced mock data cubes can be analyzed in the same way as real IFS observations by many methods, particularly codes like Voronoi binning (ascl:1211.006), pPXF (ascl:1210.002), line-strength indices, or a combination of them (e.g., the GIST pipeline, ascl:1907.025). The code is implemented using Python-native parallelization. GalCraft will be particularly useful for directly comparing the Milky Way with other MW-like galaxies in terms of kinematics and stellar population parameters and ultimately linking the Galactic and extragalactic to study galaxy evolution.