You can't tell whether two files are identical just by looking at them, but your computer can figure it out by reducing the contents of each file to a single number and comparing the two. To do this it uses a set of calculations known as a hashing algorithm. The free and incredibly simple DigestIT uses the MD5 and SHA-1 algorithms. Just select one or more files and right-click them; DigestIT's context menu lets you instantly choose a hashing algorithm or verify files against a hash. Generated hashes can be saved to the clipboard or a file. In our tests, DigestIT processed a 2GB file without trouble. It's a handy little tool for software developers and cryptography buffs.
What's new in version 3.0.2004
ReleaseNovember 8, 2008
Date AddedMay 28, 2005
Operating SystemsWindows 2000, Windows 98, Windows Me, Windows, Windows XP
digestIT 2004 allows you to easily calculate or verify an MD5 or SHA-1 hash by right-clicking on the file in Explorer. Copy the results to the clipboard or save them to a file. Can calculate the MD5 or SHA-1 for multiple files, but will not re-curse into folders. Can verify only one file at a time.