Supernovae are another area of impact of the J-PAS survey. Due to the broad spectral features of supernovae, the filter system of J-PAS is ideal not only to discover them, but also to measure their light curves, to characterize their types (SN Ia/Ib/Ic/II etc.) and to extract their redshifts. J-PAS will discover and classify thousands of low- to medium-redshift supernovae, and will have a major impact in controlling some of the main systematic uncertainties associated with these standardizable candles.

One of the niches that the J-PAS supernova survey will explore is the excellent characterization of the supernova's environments that the 56 filters will allow. For most low-redshift objects, J-PAS will be able to distinguish the resolved stellar populations in every galaxy where a supernova is discovered.