If you are a small business owner or accountant, you may need to open a qbb file without QuickBooks in order to access financial data stored in the file. This could be necessary if you do not have access to QuickBooks or if the file was created in an older version of QuickBooks that is no longer supported. Additionally, if you are collaborating with another business or accountant, they may send you a qbb file that you need to open without QuickBooks in order to view the data.