Here’s a clear, informative text you can use for a blog post, software description, or help guide. If you’ve worked with QuickBooks , you’ve likely encountered an IIF file (Intuit Interchange Format). These files are used to import or export lists, transactions, and journal entries into QuickBooks Desktop. However, IIF files are not easy to read, analyze, or edit directly—they open as text in a messy, delimited format.