DiffEngineX

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DiffEngineX is a spreadsheet comparison program published by Florencesoft. Specifically it is used to compare Microsoft Excel sheets. It produces a report of differences as well as color highlighting each differing cell. To avoid altering the worksheets being compared it highlights automatically made copies instead.

Unique amongst spreadsheet comparison tools it can align both rows and columns in the two workbooks being compared. This is useful when the modifications include the addition of new rows and the deletion of existing ones.

It has many powerful features such as the ability to hide matching rows, group like changes to adjacent cells and highlight differences at the character level. It can be used from its user interface or programmatically using command-line arguments.