SNPPIT (SNP Program for Intergenerational Tagging) is a program for performing fast and accurate, likelihood-based, parentage inference with single nucleotide polymorphisms (SNPs). The software is tailored for inference of mother-father parent pairs, not for single parents. It takes a simple input file that includes the genotypes of the possible parents and of the offspring whose parentage is to be inferred. Parents in the parent database may come from multiple populations.