This tool is to check the links that you download from google drive, to see if the links are good or corrupted due to a bad download.

On the Seven-Gamers Drive page, when you load the links of any game, you have a button called MD5 available,

If you press it you will download a .md5 file, it is a text file that you can open with the notepad and that It contains the code (hash) for each link,

When you download the links, load them with the md5checker and click Start button, it tells you the code (hash) of the files,

Simply compare and if they are exactly the same, the links are fine, if there is one that does not match you will know that the file is corrupt, you must download that link again.