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With the free software CompareChecksum you can calculate checksums of any files on your harddisk, without effort. Calculation starts automatically, if you select a file per dialog or if you drag and drop a file on the software-window. Even more simple is it to start CompareChecksum by clicking with the right mousebutton on on file and using the "Send to"-option.

By comparing the checksums of two files, you can determine, that a download via internet was not corrupted. At the same time you can check if the file was possibly targetted by a manipulation.
Besides, you can control, if pictures or documents with different names, have identical content.

Screenshots

Context menu of a file Screenshot of the installation wizard CompareChecksum program window

Free download

You can download an istallation wizard that generates automatic shortcuts in your Start Menu folder, on your Desktop and in the Send To folder, if you like. Besides there will be an uninstaller, that enables you to remove all components of CompareChecksum after useage.
You can also extract the files of CompareChecksum by hand. CompareChecksum runs without installation, so it is perfect for portable and mobile use on a USB-device.

Download CompareChecksum with installation wizard
MD5-Prüfsumme: 3792f354063db93de46bb60f0508e082
SHA1-Prüfsumme: c7c35c327ece034ac1924b85b8a2243abd966b3e

Download CompareChecksum (for manual extraction without wizard)
MD5-Prüfsumme: 5d5d2785654580853748e12740df0d88
SHA1-Prüfsumme: 51c5011314c95fc670711ac99e620f9afa4e3a0b