How do you remove duplicate entries from multiple Excel workbooks at once?

[Keth]

I'm searching for a reliable way to clean duplicate records from Excel spreadsheets. The built-in Excel option works, but I want more control over how duplicates are identified and handled.

My requirements are:

Compare selected columns
Remove duplicate rows
Keep original formatting
Support XLS and XLSX files
Handle large spreadsheets

Someone suggested the SysTools Excel Duplicates Remover Tool. If you've used it, how was your experience? Are there any better alternatives?