The FinancialDataTools.com CSV to IIF Converter is a free, browser-based tool for converting CSV files to QuickBooks IIF format. It runs entirely in your browser — no file is ever uploaded to any server.
How It Works
Drop your CSV file onto the left panel or click Open to browse. Select your IIF record type from the dropdown. Your source data is previewed in a table. Click Convert to IIF to generate the output in the right panel. Click Export IIF to download the result file.
Privacy and Security
All file processing happens inside your browser using JavaScript. No file content is transmitted to any server. Your financial data stays private on your device.
Is the CSV to IIF Converter free?
Yes, completely free with no signup required.
Does my file get uploaded to a server?
No. All processing is local in your browser. Nothing is uploaded.
What record type should I choose?
Choose the IIF record type that matches your data. TRNS is used for transactions, SPL for split lines, ACCNT for chart of accounts, CUST for customers, VEND for vendors, and so on.