KineticDB is a systematically compiled database of protein folding kinetics. The main goal of the KineticDB is to provide users with a diverse set of protein folding rates determined experimentally. At present, the KineticDB contains the results of folding kinetics measurements of single-domain proteins and separate protein domains as well as short peptides without disulfide bonds. Each record of the KineticDB relates to a single protein folding kinetics measurement extracted from the original paper and gives details of the experimentally studied protein, its best available tertiary structure, experimental conditions, reference to the original paper and experimental results. The KineticDB is freely available.