Home : File Types : _XLSX File

._XLSX File Extension

File TypeRenamed Microsoft Excel Spreadsheet

DeveloperN/A
Popularity
3.1 (13 Votes)
CategorySpreadsheet Files
FormatZip

What is a _XLSX file?

An _XLSX file is a Microsoft Excel spreadsheet that has had its extension changed from .XLSX to ._xlsx. A user or program may have changed the file's extension on purpose or by accident. _XLSX files can be opened in Microsoft Excel and other spreadsheet programs after you rename them to use the .xlsx extension.

More Information

_XLSX files are almost always renamed XLSX files. Most commonly, email programs such as Windows Live Mail mistakenly produce _XLSX files. This happens when a user attaches a spreadsheet whose filename ends in . to an email.

For example, if you attach a spreadsheet named spreadsheet..xlsx to an email, Windows Live Mail will rename that file to spreadsheet._xlsx. This issue also occurs when users attach .DOC, .DOCX, and .XLS files to emails.

While XLSX, and thus _XLSX, files are typically created by Microsoft Excel, they can also be created using other spreadsheet programs, such as OpenOffice Calc or Apple Numbers. After renaming your _XLSX file to use the .xlsx extension, you should be able to open the file in any of those programs.

How do I open a _XLSX file?

After renaming your _XLSX file to use the .xlsx extension, you can open it in any program that opens XLSX files. These include:

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Programs that open _XLSX files

Windows
Must be renamed to .xlsx then opened as an XLSX file
Mac
Must be renamed to .xlsx then opened as an XLSX file
Linux
Must be renamed to .xlsx then opened as an XLSX file
Web
Must be renamed to .xlsx then opened as an XLSX file
iOS
Must be renamed to .xlsx then opened as an XLSX file
Android
Must be renamed to .xlsx then opened as an XLSX file
Chrome OS
Must be renamed to .xlsx then opened as an XLSX file
Updated 1/29/2021

About _XLSX Files

Our goal is to help you understand what a file with a *._xlsx suffix is and how to open it.

The Renamed Microsoft Excel Spreadsheet file type, file format description, and Mac, Windows, Linux, Android, and iOS programs listed on this page have been individually researched and verified by the FileInfo team. We strive for 100% accuracy and only publish information about file formats that we have tested and validated.

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