The data provided is spectra and line fluxes used for metallicity measurements of supernova environments published in our paper “Metallicity differences between Type IIP and stripped-envelope supernova environments” - Ganss R et al., 2025, Monthly Notices of the Royal Astronomical Society, Volume 543, pp-2374. We refer the user to the full description of the data in the paper and to the README file here for the naming conventions and other details. Permission is hereby granted, free of charge, to any person obtaining a copy of these data to use, copy, modify, merge, publish and/or distribute provided our paper Ganss R et al., 2025, MNRAS, 543, 2374 is referenced accordingly. There is no warranty of any kind and the use of the data is at your own risk. Any questions to the data can be emailed to JPledger@uclan.ac.uk.