Convert IIF to CSV
Drop in an .iif file and get back a plain CSV, with a balance check that proves nothing was dropped.
No sign-up needed. Files never leave your browser.
- Balancing splits are skipped, so the transactions come out once rather than netting to zero
- Nothing is uploaded. The file is read in this browser tab and never stored
- No account and no card, with no limit on conversions
IIF is the tab-delimited format QuickBooks Desktop reads and writes. It is technically openable in a spreadsheet, and doing so is how most people discover the result is unusable. The file interleaves several different record types, each with its own column headings, so a single grid of columns cannot describe it.
The other surprise is that every transaction appears twice. IIF describes double-entry bookkeeping, so a payment is written once against the bank account and again, negated, against an offset account. Add up a naive export of the file and you get zero. Only the bank-side rows are read here.
What comes out is four plain columns: date, description, direction and amount. Dates are yyyy-mm-dd and amounts carry no thousands separators, so a spreadsheet reads them as dates and numbers rather than text.
New to these formats? Read what an IIF file is and what varies in a bank statement CSV. They cover what each one holds, and what neither can tell you.
A converter that tells you when it missed something.
Most tools hand you a file and let you find out in your ledger. Every conversion here is reconciled against the closing figure first. That figure is read from your statement’s balance column, or typed in from the page when there isn’t one.
When the totals don’t meet you get the exact size of the gap, every row that did read, and the converted file anyway.
Sample balance check
A transaction may be missing. Review the rows below, or re-upload including all pages.
A sample result. This is the same component the converter uses.
Client statements never leave the tab
Conversion runs in your browser, in JavaScript on this page.
Closing the tab discards the file and everything read out of it. There is nothing to delete later and nothing to breach.
There is no upload step to decline, because there is no upload. Open your browser's network tab and convert. You will see no request carrying your data.
Once this page has loaded, conversion runs with no connection at all. Useful on a client site with locked-down wifi. It also proves the file stays put.
Questions people actually ask
Why does my IIF have twice as many rows as transactions?
Because it is double-entry. Each transaction is a TRNS line against the bank account followed by one or more SPL lines against the accounts it was categorised to, carrying the same amounts with the sign flipped. The pair always sums to zero, which is the point of the format and the reason a naive read of it produces nothing.
Will it read an IIF that is not a transaction export?
No, and it says so rather than producing an empty file. IIF is also used to move chart-of-accounts, customer, vendor and item lists between company files. Those carry no transactions, so there is nothing to convert.
Does the column order in my file matter?
No. Every IIF declares its own columns in a heading line beginning with an exclamation mark, and the converter reads that line to find out which column is the date, the amount and the memo. QuickBooks emits different column sets depending on version and on what was exported, which is exactly why the positions are never assumed.
Does my statement get uploaded anywhere?
No. The conversion runs inside your browser using JavaScript on this page. The file is read from your disk into memory, converted, and offered back as a download. Nothing is sent to a server, so there is nothing for us to store, log or delete. You can confirm this by opening your browser's network tab while you convert.
Do I need an account?
No. There is no sign-up, no email capture and no usage limit on CSV conversion.
How do I know every transaction came through?
Every conversion shows a balance check above the results. If your file has a running balance column, the opening and closing balances are read from it. Otherwise you type them in from your statement. The check adds up every converted transaction, compares the total to the closing balance, and tells you the exact size of any difference.
My dates came out wrong. What happened?
A date like 05/01/2026 is ambiguous: 5 January in the UK and most of Europe, 1 May in the US. Turn on the day-first option and the file is re-read immediately. If your statement contains a date that can only be day-first, such as 19/02, the converter points this out before you download.
Some rows were skipped. Is that a problem?
Usually not. Totals rows, page footers, repeated column headings and blank lines carry no transaction date, so they are left out and counted. The skipped count is shown with the results so you can check it against what you expected.
Try it on the statement that’s annoying you right now.
No account, no card, no limit. If the layout isn’t recognised you will know immediately, rather than after a support ticket.