Checksum, MD5, SHA-1, SHA-256… What’s all this?

Checksum, MD5, SHA-1, SHA-256, etc. all mean the same thing: a way to verify the integrity of data, file or software.

Simply put, it’s an easy way to tell if the file you have is genuine or have been tempered with. (infected, modified, corrupted, etc.)



You download a software from a mirror server and you want to verify if the file you have is genuine. You navigate to the author’s website and see a checksum code: you then verify the file you have with that code. If they match, you know you’ve got genuine file!


Simple MD5

For those who simply want a simple MD5 generator/verification, I packaged one along with an icon. See references below.


FREE TOOL – File Checksum

I recently substituted my simple md5 app with File Checksum because it also includes SHA-1 and SHA-256. Note that it’s standalone and requires no installation to run. Since we’ve just discuss how checksum works, you might want to verify the integrity of File Checksum itself before using it.

How can one do that WITHOUT a checksum application? Use an online checker! :





Download the simple MD5 Checksum from the now defuntc
“TSoft Ltd” here (provided by me) :
- (Requires 7zip to open)

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