In order to upload contacts into your account, we require that you first save your spreadsheet as a CSV (comma separated values) file. A CSV file stores tabular data in plain text and is saved with a .csv extension. While a CSV file may look similar to an Excel file or Google Sheet, CSVs cannot save styling, formulas, or multiple sheets.
To learn how to save your spreadsheet as a CSV file, click here.
To read more about importing contacts from a CSV file, click here.
To troubleshoot failed imports, click here.
To learn how to import contacts with multiple tags, click here.
To learn how to import contacts that have multiple values for a single field, click here.