A brilliant file verification tool gives you a second opinion for your data’s integrity
Pros & Cons:
This is the only free checksum utility that is truly easy to do hash checks on large sets of files. It will indicate if a file is incomplete, changed or any files are missing.
ExactFile is the only free checksum utility I have found that includes a feature which makes it truly easy to do hash checks on large sets of files. Its usage is simple. You click the button labelled “Create Test File Applet” which creates a “digest” of the files in whatever folder you wish. It also places a small 360Kb executable file in the same folder. After you move your files you simply double click the TestFiles.exe and it will verify the integrity of those files. Not only will it indicate if a file is incomplete or changed in some way, it will also report if any files are found to be missing.
One possible scenario would be to use it along with a backup program to verify the files in your “My Documents” folder after a backup is completed. First you would run ExactFile and create a TestFile applet. Next perform the actual backup, and finally run the TestFile applet on the backup files. There is a command line version of ExactFile that could be used with backup programs that have the ability to perform pre and post backup job tasks. You would set up your backup program to run the commands to create the digest, before performing the backup, and to verify the files automatically for you afterwards.
One limitation to using ExactFile with backup programs, is that they often store files in special compressed archives. You will only be able to use ExactFile with uncompressed mirror style backups. If your backup program uses Zip compression to archive files, you could possibly use ExactFile in conjunction with a program like WinMount or Pismo File Mount which can mount a Zip file as a virtual drive after which the TestFile applet could be run as normal.
ExactFile is particularly useful for checking the integrity of files backed up to optical media (CD or DVD). It is also quite useful to make sure that files synchronized to another computer or network share have arrived intact.
This is a great little utility with a lot of potential uses. Hopefully you will find it as useful as I have. If you know of any other programs with similar abilities, be sure to let us know in the comments below. Both the GUI version and the command line version of ExactFile can be found on the developer's site. Please note that both are still in beta but with my testing on Windows 7, 8.1 and 10, I found them completely stable and bug free.
EactFile was reviewed by Gizmos Freeware on