What is an XLS/XLSX file?
XLS/XLSX File (definition)
An XLS file is the format of Microsoft Excel 1997-2003. Microsoft Excel 2007 and newer use the XLSX file format.
An XLS file is the format of Microsoft Excel 1997-2003. Microsoft Excel 2007 and newer use the XLSX file format.
Accountants & Bookkeepers
Free accounting tools and templates to help speed up and simplify workflows.
© 2025 Intuit Inc. All rights reserved.
Intuit, QuickBooks, QB, TurboTax, ProConnect, and Mint are registered trademarks of Intuit Inc. Terms and conditions, features, support, pricing, and service options subject to change without notice.
By accessing and using this page you agree to the Terms and Conditions.