CSV to QuickBooks Desktop — IIF Converter

Your data never leaves your device. All files are processed entirely in your browser using client-side JavaScript - no data is stored on our servers or sent anywhere. There's no account to hack, no database storing your files, and no API connections to your bank or accounting software. You upload, convert, download, and we forget it immediately.

No payment or signup required. You can upload your file, see a free preview of the conversion results, and verify everything looks correct before paying anything. If it doesn't work for your files, you haven't wasted any money. We only charge when you're satisfied and ready to download the final converted file.

You can, but free scripts and AI often miss edge cases that break real-world data: missing SKUs, currency formatting quirks, tax calculation errors, or date format mismatches. We have battle-tested validators specifically designed for accounting software imports that catch these issues before they corrupt your books. Plus, you get instant browser-based conversion without installing Python or managing dependencies.

At minimum, your file needs 'Date' and 'Amount' columns. Optional columns include 'Payee', 'Account', 'Memo', 'CheckNum', and 'Class'. Column names are case-insensitive.

Use negative numbers for debits/payments and positive for credits/deposits. The Amount column can include currency symbols ($) and commas, which are automatically removed.

IIF import works with QuickBooks Pro, Premier, and Enterprise versions 2000-2025.

You can create CHECK, DEPOSIT, INVOICE, BILL, or CREDIT CARD transactions. Use 'Auto' to automatically classify based on amount sign.

Yes. The Bank Account and expense/income accounts you specify must already exist in your QuickBooks Chart of Accounts.

Yes! Select 'INVOICE' for sales transactions (A/R) or 'BILL' for expense transactions (A/P) in the Transaction Type dropdown.

Yes, QuickBooks Desktop supports both 3-column (Date, Description, Amount) and 4-column (Date, Description, Debit, Credit) CSV formats for importing transactions.

Common causes include incorrect date formatting, blank rows, mismatched column headers, special characters, or the file exceeding size limits. Ensure consistent formatting and remove any special characters.

Use a consistent date format like dd/mm/yyyy or mm/dd/yyyy throughout your CSV file. Inconsistent dates or include day-of-week names will cause import failures.

No, QuickBooks cannot automatically link invoices to payments during IIF import. You'll need to manually reconcile them after importing the data.