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.

Now, Google has announced new features for Sheets, which is now capable of removing duplicate data and trimming white spaces. The web app also receives some new keyboard shortcuts that you might ...

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