The Cryogenic Analysis Tools (CAT) is a LabVIEW and Root-based Software Package that has been developed in order to study the performances of large size cryostats, where many parameters, input and control variables need to be acquired and analyzed at the same time. The code has a 3-step-based fundamental architecture. First, a LabVIEW class of codes (VIs) collects all the data coming from different kind of instruments and pass these raw data to a dedicated Root module, called CryoNtuplizer, which produce custom Root-ntuples (CryoNtuples). At the end, a so-called Automatic Analyzer (AutoANA) analyzes the CryoNtuples, performing a complete and totally customized analysis of the data collected from the cryostat instrumentation. CAT is also able to work in stand-alone mode being able, in this way, to perform an offline analysis of the whole cryostat performances.