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What is the .XLS File Extension?

.XLS File Extension Description:

The XLS file extension is employed by Microsoft Excel, which is a spreadsheet application written and disseminated by Microsoft. It was created for Microsoft Windows and Mac OS X. Its features include calculation, pivot tables, graphing facilities, and a macro tool called VBA. Unquestionably, it is the most prevalent spreadsheet application and it is one of the most famous microcomputer applications today.

One of Excel's featured aspects is its ability to write code using a programming language, Visual Basic for Applications (VBA). The said code is written with an editor that can be viewed only from the spreadsheet. The spreadsheet becomes a window to the code, which allows easy interaction with the code and what it calculates. The VBA adds the automation ability of Excel and the usage of user defined functions (UDF) for the worksheets. Excel, which utilizes the XLS format, also includes an integrated development environment (IDE). It also permits the use of basic object-oriented programming techniques.

The version of Microsoft Excel up to 2007 version use a trademark binary file format called Binary Interchange file Format (BIFF) as its primary format. On the other hand, Excel 2007 employs Office Open XML as its primary format. Its design is similar to that of the XML-based format called "XML Spreadsheet (XMLSS)". Nevertheless, all versions save spreadsheets with the .xls extension.

There are several versions for Microsoft Windows which include 1987 Excel 2.0 for Windows, 1990 Excel 3.0, 1992 Excel 4.0, 1993 Excel 5.0, 1995 Excel for Windows 95, 1997 Excel 97, 1999 Excel 2000 in Office 2000, 2001 Excel 2002 in Office XP, 2003 Excel 2003 in Office 2003, and 2007 Excel 2007 in Office 2007. There are also versions for the Apple Macintosh which include 1985 Excel 1.0, 1988 Excel 1.5, 1989 Excel 2.2, 1990 Excel 3.0, 1992 Excel 4.0, 1993 Excel 5.0, 1998 Excel 8.0, 2000 Excel 9.0, 2001 Excel 10.0, 2004 Excel 11.0, and 2008 Excel 12.0. While for OS/2, the versions include 1989 Excel 2.2, 1990 Excel 2.3, and 1991 Excel 3.0.

The Microsoft Excel 2007 and its other products, which employ the XLS extension, possess a host of new file formats, which are part of the new Office Open XML (OOXML) specification. They include the Excel Workbook, Excel Macro-enabled Workbook, Excel Binary Workbook, Excel Macro-enabled Template, and Excel Add-in.

Author: Microsoft
Author URL:
Related Applications: Microsoft Windows version, Apple Macintosh versions, OS/2 versions
Common Path: N/A


Run a Free Scan to check for XLS related errors & to optimize PC performance.

Do you have errors with .XLS files?

What Causes .XLS files Errors?

When encountering errors with .XLS files you are potential having a serious Windows file error - the error could be the effect of damage to your program registry and action is needed to fix it immediately to avoid further damage to your operating system. As long as the errors continue your system remains in danger of potential blue screen errors, device failure and fatal crashes.

Symptoms of .XLS files Errors:

.XLS files error symptoms include program freezes, shut down or start up troubles, jerky pc operation, sluggish behaviour, screen freezing, beeping sounds, trouble loading program files and problems during application installation.

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How to Fix .XLS File Extension Errors    |    Repair .XLS File Errors    |    What is the .XLS File Extension?