IIF Editor — Free QuickBooks IIF File Viewer, Editor & Validator

IIF Editor is a free online tool for viewing, editing, validating, and exporting QuickBooks Intuit Interchange Format (.iif) files. It runs entirely in your browser — no signup, no upload, and your financial data never leaves your device.

Features

• 100% in-browser privacy — files are parsed locally; nothing is sent to any server.
• Smart structural validation — catches malformed transactions, missing headers, and broken TRNS/SPL/ENDTRNS blocks before you import into QuickBooks.
• Spreadsheet-style editing — edit transactions, accounts, customers, vendors, and lists in a familiar grid.
• Format conversion — export IIF data to XML or JSON.

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