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How do I open XLS and XLSX files?

XLS and XLSX files

Microsoft Excel XLSX icon

XLSX and XLS files are Microsoft Excel Spreadsheets commonly used to store financial data and to create mathematical models. These files store data in worksheets that contain cells arranged as a grid of rows and columns. Excel spreadsheets may also contain charts, mathematical functions, and various kinds of cell formatting. Spreadsheets are often used in business contexts to store financial data and to perform mathematical computations.

There are differences in the XLSX and XLS formats created by Excel. While XLS files use a proprietary binary format, XLSX files use a newer file format referred to as Open XML. The XLS extension is used by Microsoft Excel 2003 and earlier and the XLSX extension is used by Microsoft Excel 2007 and later.

Open XLS and XLSX files for free with File Viewer Lite

Open Excel with File Viewer Lite

File Viewer Lite is a FREE program that can open Microsoft Excel .XLS and .XLSX files.

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File Viewer Lite is a free .XLSX and .XLS file opener that allows you to view Excel documents (including .XLSM files) in their native format without having to purchase and install Microsoft Excel. In addition to Microsoft Excel files, File Viewer Lite can open over 150 file types, including Microsoft Word documents, PDF files, images, video files, audio files, and more. You can also view unsupported proprietary document formats in the program's Text and Hex Views. These views display the contents of the document, which can provide useful information.

To view your XLSX or XLS files, download our free file viewer and drag and drop the .XLSX or .XLS file onto the program window. File Viewer Lite will open the file and display the document in its native format as if you were viewing the document with Microsoft Excel.

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About File Viewer Lite

Windows File Viewer Lite combines the functionality of several programs into one simple utility. The program includes zoom and rotate controls for documents, PDFs, and images. It also includes media playback controls for audio and video files. In the rare case that a file format is not supported by File Viewer Lite, the program still displays useful information about the file type from

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