MD5 (Message-Digest algorithm 5) is a widely used cryptographic hash function with a 128-bit hash values and has been employed in a wide variety of security applications, and is also commonly used to check the integrity of files. Snap MD5 is a simple portable freeware tool which can quickly verify the file MD5 checksum. It can quickly verify and tell you if the file has been modified or not.
To use it, copy the MD5 sum from the web site, then when the file has downloaded, run Snap MD5 and browse to the downloaded file. If the checksum matches the actual value, it shows the result in green color, else shows a red color message.
The application works on all versions of Windows, 32 and 64-bit.
This is how you verify MD5 checksums on Windows
The Easy Way (digestIT with GUI)
digestIT is a graphical tool that should be easier to use for most Windows users.
Download digestIT.
Navigate in Windows Explorer to the directory where you saved/downloaded the OpenOffice.org archive.
Right click the OpenOffice.org archive file in and select digestIT -> Verify MD5 Hash (or Calculate MD5 Hash).
If you select “Verify MD5 Hash” then you will be able to copy and paste the MD5 from MD5Sum page (linked to on the latest download page). If the checksums match, you will see: “Digest matches. Verification succeeded.”
If you select “Calculate MD5 Hash” then you will need to visually compare the calculated MD5 with the one listed on the MD5Sum page (linked to on the latest download page).