We show you how to highlight duplicates in Google Sheets using the COUNTIF and ARRAYFORMULA functions under the conditional format rules.

Install the Remove Duplicates add-on from the Google Workspace Marketplace. In your sheet, click Extensions, then Remove Duplicates, and choose: Find Duplicates or Uniques.

The duplicates will be highlighted in the A column. Google Sheets also provides further customization options for highlighting duplicates such as making them bold or changing their color.

You can delete duplicate rows in Excel and Google Sheets using this simple trick. You need Remove Duplicates add-on for Google Sheets.

Once we started using Google Sheets’ built-in tools to highlight duplicates, it became one of those productivity hacks we rely on every single month.

Additionally, Google Sheets can help you find and remove duplicate data. Select a range, then choose Data | Remove Duplicates.