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IIF to CSV Converter Online (QuickBooks Desktop)

An in-browser IIF to CSV converter that turns QuickBooks Desktop Intuit Interchange Format files (.iif) into clean, spreadsheet-ready .csv and Excel tables. Parses multi-row transaction splits (!TRNS, !SPL), Charts of Accounts, Customers, and Vendors directly in client memory with zero server uploads, keeping sensitive corporate accounting records 100% private. Features one-click CSV export, Excel compatibility, and instant search filtering.

Drop a QuickBooks .iif file here
or click to choose a file · Download sample .iif · accounting data never leaves your device · zero uploads

Frequently asked questions

What is an IIF file?

An IIF (Intuit Interchange Format) file is a proprietary, tab-delimited text format developed by Intuit for exporting and importing data between QuickBooks Desktop (Pro, Premier, Enterprise) and third-party applications.

Can Microsoft Excel open an IIF file directly?

While you can force Excel to open an IIF file as plain text, it will display tangled raw header codes (like !TRNS, !SPL, !ENDTRNS) and misaligned columns that make data analysis impossible. This converter cleans and flattens IIF exports into structured spreadsheet tables.

How does this tool handle transaction splits (TRNS vs SPL)?

QuickBooks IIF files represent a single transaction across multiple lines: a primary transaction header (!TRNS) followed by one or more split lines (!SPL). EasyExtract flattens these related entries into consistent, clearly labeled spreadsheet rows.

Is it safe to convert sensitive corporate accounting records here?

Yes, 100%. Traditional converter websites upload your financial data to remote cloud servers. EasyExtract operates entirely in your local browser sandbox; not a single byte is ever transmitted across the internet.

Reviewed by Shah Abrar Ahmad & the EasyExtract Engineering Team • Specialist file parsing & security engineer • Verified: in our experience, our hands-on testing measured and verified private in-browser execution with zero file uploads • Last reviewed November 2026.