QuickBooks Desktop IIF File Validator

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Validation Report Format
valid rows

Check your IIF file for errors before importing to QuickBooks Desktop.

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Download Clean Sample

Valid QuickBooks Desktop IIF file (no errors)

Clean Template

Download Error Sample

Sample with validation errors for testing

Error Example

Validation Questions Answered

What is an IIF file?

IIF (Intuit Interchange Format) is a tab-delimited text format for importing data into QuickBooks Desktop. It supports transactions, lists, and other data types.

How should IIF transactions be structured?

Each transaction starts with a TRNS row, followed by SPL (split) rows, and ends with ENDTRNS. All amounts must sum to zero.

Why must amounts sum to zero?

IIF uses double-entry accounting. The TRNS row amount plus all SPL row amounts must equal zero for each transaction.

How Validation Works

Issues are flagged inline with clear fix suggestions — review and correct before you import.

Why Validate IIF Files?

IIF Format is Strict

IIF files use a specific tab-delimited structure with TRNS/SPL/ENDTRNS rows. All amounts in a transaction must sum to zero. Wrong structure causes import failures. Validating first catches balance issues and structural problems.

What This Tool Checks

We validate your IIF file against QuickBooks Desktop requirements: - Correct row structure (TRNS, SPL, ENDTRNS) - Transaction amounts sum to zero - Required columns present (TRNSTYPE, DATE, ACCNT, AMOUNT) - Date format correct (MM/DD/YYYY) - Valid transaction types You get a detailed error report to fix issues before import.

Your Data Stays Private During Validation

Every Row Checked

Each record is validated against format rules. Catch errors before they reach your platform.

Runs in Your Browser

Validation happens locally. Your data never leaves your browser.

GDPR Compliant

No files uploaded, no data retained. Full EU privacy compliance.

Why Validate Before Importing?

Structure Validation

Checks TRNS/SPL/ENDTRNS row structure is correct.

Balance Checking

Verifies each transaction's amounts sum to zero.

Transaction Errors

Get specific error messages for each invalid transaction.

Type Validation

Validates transaction types (CASH SALE, INVOICE, CHECK, etc.).

Browser-Based

Files processed locally. Your data never leaves your computer.

Instant Results

Get validation results in seconds, even for large files.

Common Target Import Errors

Issues you might encounter when importing Source data to Target - and how we solve them

Invalid IIF Structure

IIF requires TRNS/SPL/ENDTRNS row structure

Missing ENDTRNS or mismatched rows
TRNS row, SPL rows, ENDTRNS row

Each transaction needs proper start/split/end structure

Ensure every TRNS has matching ENDTRNS

Unbalanced Transaction

Transaction amounts don't sum to zero

TRNS: 100, SPL: -90 (sum: 10)
TRNS: 100, SPL: -100 (sum: 0)

All amounts in a transaction must sum to zero

Adjust split amounts to balance the transaction

Invalid Transaction Type

TRNSTYPE is not a recognized QuickBooks type

SALE or RECEIPT
CASH SALE, INVOICE, CHECK, DEPOSIT

Use valid IIF transaction types

Change to valid type; note 'CASH SALE' has a space

Missing IIF Header

IIF file missing header rows (!TRNS, !SPL, !ENDTRNS)

File starts with data rows
!TRNS header row before data

IIF files need header rows starting with !

Add proper IIF headers at the start of file

Delimiter Issue

IIF must be tab-delimited, not comma-delimited

TRNS,CASH SALE,01/15/2025
TRNS[TAB]CASH SALE[TAB]01/15/2025

IIF format requires tab characters between fields

Re-export as tab-delimited or replace commas with tabs

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Frequently Asked Questions

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.
IIF (Intuit Interchange Format) is a tab-delimited text format for importing data into QuickBooks Desktop. It supports transactions, lists, and other data types.
Each transaction starts with a TRNS row, followed by SPL (split) rows, and ends with ENDTRNS. All amounts must sum to zero.
Common types include CASH SALE, INVOICE, CHECK, DEPOSIT, BILL, CREDIT MEMO, GENERAL JOURNAL. Use 'CASH SALE' (with space) for sales receipts.
IIF uses double-entry accounting. The TRNS row amount plus all SPL row amounts must equal zero for each transaction.
IIF import is supported in QuickBooks Pro, Premier, and Enterprise editions (2020-2025).
No. QuickBooks stops reading the line at a semicolon, causing the import to fail if required fields appear after it. Avoid semicolons in all text fields.
All accounts referenced in the IIF file must exist in your QuickBooks chart of accounts. Add missing accounts before importing.
Use Tab Delimited format. Open the file in a text editor like Notepad to verify proper formatting and check for missing headers or columns.
Start with a small batch of test data to catch errors early. This helps identify formatting issues before attempting a large import.
IIF files created in newer versions may not be compatible with older versions. Ensure your QuickBooks Desktop is up to date.

Alternative tools for QBD IIF:

  • QuickConverter — CSV/QBO/QFX/OFX to IIF converter for QuickBooks Desktop
  • AAATEX — CSV/Excel to QuickBooks importer (TransImporter)
  • Big Red Consulting — QuickBooks file conversion and CSV/Excel to QuickBooks importer
  • ProperSoft — Desktop CSV to QBO/IIF converter for QuickBooks
  • Dancing Numbers — How to Import CSV Excel Files to QuickBooks Online?

Learn More:

vs QuickConverter vs AAATEX vs Big Red Consulting vs ProperSoft vs Dancing Numbers vs Zed Systems