Journal Citation Reports (JCR) is a database containing statistics and quantitative tools for systematic and objective evaluation, categorization and comparison of more than 12.000 peer-reviewed scientific and professional journals. One of the tools for such comparison is the so-called "impact factor", which gives the rate of frequency of citations of an average article of a given journal for a given period of time and can be used as a basis for estimating the prestige of academic journals.

JCR serves primarily the needs of information specialists, publishers and editors, but is also used by authors (for example, to select journals to publish and to identify journals relevant to their area of research).