By using the Highlight Cells Rules, you can highlight duplicate cells in your Excel worksheet to avoid confusion and mistakes.

To pinpoint duplicate entries, apply Excel's conditional formatting feature: Open the Excel worksheet containing the data in question. Select the column or range you want to inspect for duplicates.

If you want duplicate values to stand out in an Excel spreadsheet, you can choose between two conditional formatting rules.

This formatting lets you avoid the tedious task of manually scrolling through a large number of entries and highlighting each duplicate entry.

For example, select "equal to" to isolate a specific value or "duplicate values" to find duplicate data entries. Enter information in the first part of the rules dialog box to isolate the value.

How can we find duplicate values across multiple columns? For this task, we’ll use two Excel helper formulas: One to concatenate the columns you’re comparing; a second to count the duplicates.

Duplicate Remover for Excel goes through massive worksheets withtables up to 1 monster 1 million rows, and then finds and killsduplicate entries.