Checksum Calculator

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A checksum value is an integer, typically one, two, four, or eight-byte long. To compute the checksum, adjacent bytes in the file (starting with the first byte of the file) are united to form one, two, four, or eight-byte integers, each is called a unit. If the last one is an incomplete unit, it will be padded with one or more padding bytes. The one's complement sum of all the integers is the checksum.

The Checksum Calculator can be used to apply the checksum algorithms to a file. To activate the tool, you can choose Checksum Calculator... item From the Tools menu.

You can explicitly exclude certain byte ranges by selecting Ignore Ranges check box and enter the ranges in the associated edit box. This feature is useful to calculate the checksum for file in which the actual checksum is stored and thus should be excluded from the calculation.

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