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

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.

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.

Now, if you have a spreadsheet that contains hundreds of the same values in different rows, you can delete the duplicate rows in Excel and Google Sheets using this simple trick.

You can easily delete rows in Google Sheets on a computer or mobile device in a few steps. Here's how to do it.

For example, when hiding a single row in Google Sheets: Click the row header to highlight the whole thing automatically. Right-click any of the highlighted rows Select Hide row from the options.