The handy and fast utility for protecting the integrity of files by using the CRC32 or MD5 checksum calculation algorithms. It will allow you to verify the accuracy of your data after you burn a CD or transfer a files over a network.
Adding an little checksum file to your data files will allow in further easily to verify their integrity at any time. This program is especially effective if you have many files, many subdirectories, or both.
And it's extremely fast and lightweight. Uses checksum files fully compatible with popular md5sum utility for MD5 and SFV (Simple File Verification) for CRC32.