The purpose of this page is to allow you to find out the differences between two delimited files. 

First select the primary and secondary files.  These files must have the same number of columns, and the same column headers.  Then enter in which column should be used for comparison, this would be the column that contains a unique value.  If multiple rows have the same value in this column, it will be impossible to determine which row to compare between the two files.  The first column would be 1, the second 2, and so on.  Next, select which delimiter is used for the input files (comma, tab, semicolon, space), and which delimiter you want used to create the output file.  Lastly, select what extension you want the output file to have.