Fortunately, you can convert Excel files to plain text files, which can then be imported into almost any spreadsheet program, such as Intuit's QuickBooks accounting software.

Microsoft Excel has an import wizard, but if you structure the text correctly, you can bypass the wizard altogether.

How to convert an XLS file to CSV Let’s say you have the file clients.xlsx and you need it converted to clients.csv to be then uploaded as a client list in your new CRM tool.