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

Duplicate data in your spreadsheets can give you headaches, and it can happen because of a variety of ways. Fortunately, your spreadsheet app can help.

If you’ve added the same data more than once by mistake on a spreadsheet or you’re simply looking to find duplicate data, Google Sheets lets you highlight them.

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 ...

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