"The correct answer is Option 2 (.xlsx).
Key Points
The default file extension for spreadsheets created in Microsoft Excel is .xlsx.
Introduced in Microsoft Excel 2007, the .xlsx format is based on XML and is part of the Office Open XML standard.
It offers improved data management and reduced file size compared to the older .xls format.
Other extensions used by Microsoft Excel include .xls (for older versions) and .xlsm (for macro-enabled workbooks).
Additional Information
.mxl: This is not a valid extension for Excel files. It is commonly associated with music notation files.
.mxls: This is not a valid extension for Excel files and appears to be a typo.
.mxlx: This is also not a valid extension for Excel files and appears to be incorrect." Answer from Testbook on testbook.com
Filo
askfilo.com › international baccalaureate › smart solutions › the default file extension of ms excel is _
The default file extension of MS Excel is _... | Filo
August 12, 2025 - The default file extension of MS Excel is .xlsx.
Prepp
prepp.in › home › fundamentals of computer › microsoft office › which one is the default file extension of the lat
Which one is the default file extension of the latest versions of MS Excel spreadsheets ?
January 13, 2026 - Therefore, for the latest versions of MS Excel, the default file extension is .xlsx.
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Microsoft Excel - File Formats: Differences, Pros, and Cons - YouTube
LEADZONE
leadtools.com › help › sdk › v20 › main › api › file-formats-ms-excel-format-xls-xlsx.html
File Formats: MS-Excel format (XLS, XLSX) | Color and Grayscale | Raster Imaging C API Help
The file format is based on the Open XML data format. ZIP compression is used on .xlsx files, resulting in smaller file sizes. LEADTOOLS has an XLSX filter to support the loading of XLSX (2007/2010). For more information, refer to http://www.ecma-international.org/publications/standards/Ec...
Microsoft Support
support.microsoft.com › en-us › office › change-the-default-file-format-for-saving-workbooks-16318414-f050-40b8-8b17-23ff5f381fb5
Change the default file format for saving workbooks | Microsoft Support
In Microsoft Excel, workbooks are saved as Excel Workbooks (.xlsx) by default. You can change the default file format to any other file format that is supported in Excel. For example, if you frequently create macros in a workbook, you may want to automatically save a new workbook as an Excel ...
Brainly
brainly.com › computers and technology › high school › what is the default extension for an ms excel workbook?
a. .csv
b. .txt
c. .xls
d. .xlsx
e. .xlssx
[FREE] What is the default extension for an MS Excel workbook? A. .csv B. .txt C. .xls D. .xlsx E. .xlssx - brainly.com
May 26, 2025 - The default extension for an MS Excel workbook is .xlsx. In the context of Microsoft Excel, file extensions are significant as they determine the format of the file and inform the software how to process it.
Brainly
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Default files extension for microsoft excel: - Brainly.in
July 12, 2023 - The default file extension for Microsoft Excel is ".xlsx" for Excel 2007 and newer versions. Prior to Excel 2007, the default file extension was ".xls". The newer file format with the ".xlsx" extension is based on the Office Open XML (OOXML) ...
Wikipedia
en.wikipedia.org › wiki › List_of_Microsoft_Office_filename_extensions
List of Microsoft Office filename extensions - Wikipedia
2 weeks ago - Office Open XML (OOXML) format was introduced with Microsoft Office 2007 and became the default format of Microsoft Word ever since. Pertaining file extensions include: ... Legacy filename extensions denote binary Microsoft Excel formats that became outdated with the release of Microsoft Office ...
Filo
askfilo.com › cbse › smart solutions › what is the file extension of ms excel 2016?
What is the file extension of MS Excel 2016?... | Filo
October 20, 2025 - The default file extension for Microsoft Excel 2016 workbooks is .xlsx.
EDUCBA
educba.com › home › excel › excel resources › excel tips › excel extensions
Extensions of Excel | Types of File Formats ( XLS, XLSX, XLSM, XLSB )
February 17, 2025 - These extensions of Excel are important ... extension is .xlsx, which stores the simple type of Excel data. XLS is another default extension used until MS Office 2007....
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Gigasheet
gigasheet.com › post › your-guide-to-excel-file-extensions
Your Guide to Excel File Extensions
October 21, 2022 - The number of extensions available will differ depending on the language version of the Excel you’re using. But the default file extension for Excel 2007 and onwards remains .xlsx
ExcelMojo
excelmojo.com › home › excel extensions
Excel Extensions - Types Of File Formats, How to Show/Hide?
April 23, 2026 - We will find the Extensions in the Save As window as the Save as type: options. If we are looking for the default Excel Extensions, we can save our file with the extension (*.xlsx).
Quora
quora.com › What-is-the-extension-name-of-Excel
What is the extension name of Excel? - Quora
Answer (1 of 23): .xls - 97–2003 format excel file .xlsx - Excel workbook (anything over 2003 format) .xlsm - Macro enabled Excel workbook .xlt - 97–2003 Format Excel Template .xltx - Excel Template .xltm - Macro Enabled Excel Template .xla - 97–2003 Excel Addin .xlam - Excel Addin Other ...
Studocu
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[Solved] What is a default file extension for all excel files Question - computer fundamentals (gst103) - Studocu
October 4, 2023 - This file extension is used for Excel files created in Microsoft Excel 2007 and later versions. The ".xlsx" extension ind... ... AI answers may contain errors. Please double check important information and use responsibly. ... In what ways have computers transformed sectors such as education, agriculture, healthcare, business, and the military, and what do you think are the most significant positive and negative impacts of this dependence on computer technology?
Top answer 1 of 2
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.xlsb is the default extension of an Excel 2013 workbook.
2 of 2
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Explanation:file formats that are supported in ExcelExtension Name of file format.xlsb Excel Binary Workbook.xlsm Excel Macro-Enabled Workbook.xlsx Excel Workbook.xlsx Strict Open XML SpreadsheetIn Microsoft Excel, workbooks are saved as Excel Workbooks (. xlsx) by default. You can change the default file format to any other file format that is supported in Excel. For example, if you frequently create macros in a workbook, you may want to automatically save a new workbook as an Excel Macro-Enabled Workbook (.
Lifewire
lifewire.com › excel-file-extensions-and-their-uses-3124113
What Are The Different File Extensions in Excel Used For?
May 28, 2020 - XLSX is Excel's default file extension. There are others including XLSM, XLS, XLTX, and XLTM. Here's how they are used. Updated to include Excel 2019.
Top answer 1 of 2
1
xlsExplanation:The XLS file extension is used for files saved as Microsoft Excel worksheets. Excel is a popular spreadsheet program used with data like numbers and formulas, text, and drawing shapes. Excel is part of the Microsoft Office Suite of software.
2 of 2
1
The extension of Microsoft Excel files is typically ".xlsx" for files created in the newer versions of Excel (2007 and later). In older versions of Excel, the extension might be ".xls". Additionally, Excel files containing macros may have the extension ".xlsm", and Excel template files have the extension ".xltx" or ".xltm" for macro-enabled templates.please mark as brainliest ❣️‼️
Brainly
brainly.com › computers and technology › high school › excel files have a default extension of:
a) .xlsx
b) .123
c) .ppt
d) .doc
[FREE] Excel files have a default extension of: a) .xlsx b) .123 c) .ppt d) .doc - brainly.com
This information is supported by Microsoft documentation, which details the file formats used in different versions of Excel. ... Excel file extensions typically have a .xlsx extension as the default for modern versions, while older versions ...