CRC32 is small utility that is designed to calculate the 32 bit CRC for a file. A Cyclic Redundancy Check, or CRC, is a easy and very fast method to check whether a file has been damaged or changed. A CRC is a unique signature, belonging to only one file. Many programs check the CRC with the calculated CRC to make sure that the file has not been damaged or tampered with.CRC32 is very easy to use. Simply type CRC32 followed by the name of the file. The CRC value returned, as it is stored in the .TIC files, in hexadecimal format.