File extension XLSX

File type Microsoft Excel 2007, Excel 2010 And Excel 2013 Open XML Workbook Format
Developer Microsoft
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What is a XLSX file?

The .XLSX file refers to Microsoft Excel Open XML spreadsheet format files. These are the latest version of spreadsheet files offered by Microsoft

Program(s) that can open the .XLSX file

More information about XLSX file

XLSX is a spreadsheet document file generated by Microsoft Excel software. XLSX file stores various types of data in cells. XLSX files can also contain graphs, mathematical formulas, styles, and formatting.

Organized layout

XLSX file format uses tables to a means of organizing, analyzing and storing data. A table is composed of cells (each individual cell can have unique formatting) organized in rows and columns creating a spreadsheets that in turn create a larger structure called worksheet.

XLSX open format

XLSX spreadsheet combines Open XML architecture with and ZIP archive for smaller files sizes and easier file management. In effect, an XLSX file is a ZIP archive composed of many smaller XML files. Microsoft developed the open XLSX format as a direct result of competitive pressure from Open Office and its Open Document Format (ODF). Although XLSX and ODF both are based on Open XML standard, they differ in various key aspects.

XLSX as the successor to XLS

XLSX was introduced along with Microsoft Office 2007 effectively replacing the older XLS format, which was until then considered the most popular format for spreadsheet documents.

How to open XLSX files

If you cannot open the XLSX file on your computer - there may be several reasons. The first and most important reason (the most common) is the lack of a suitable software that supports XLSX among those that are installed on your device.

A very simple way to solve this problem is to find and download the appropriate application. The first part of the task has already been done – the software supporting the XLSX file can be found in the table. Now just download and install the appropriate application.

Possible problems with the XLSX format files

The inability to open and operate the XLSX file does not necessarily mean that you do not have an appropriate software installed on your computer. There may be other problems that also block our ability to operate the Microsoft Excel 2007, Excel 2010 And Excel 2013 Open XML Workbook Format file. Below is a list of possible problems.

  • Corruption of a XLSX file which is being opened
  • Incorrect links to the XLSX file in registry entries.
  • Accidental deletion of the description of the XLSX from the Windows registry
  • Incomplete installation of an application that supports the XLSX format
  • The XLSX file which is being opened is infected with an undesirable malware.
  • The computer does not have enough hardware resources to cope with the opening of the XLSX file.
  • Drivers of equipment used by the computer to open a XLSX file are out of date.

If you are sure that all of these reasons do not exist in your case (or have already been eliminated), the XLSX file should operate with your programs without any problem. If the problem with the XLSX file has not been solved, it may be due to the fact that in this case there is also another rare problem with the XLSX file. In this case, the only you can do is to ask for assistance of a professional staff.

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How to associate the file with an installed software?

If you want to associate a file with a new program (e.g. my-file.XLSX) you have two ways to do it. The first and the easiest one is to right-click on the selected XLSX file. From the drop-down menu select "Choose default program", then click "Browse" and find the desired program. The whole operation must be confirmed by clicking OK. The second and more difficult to do is associate the XLSX file extension to the corresponding software in the Windows Registry.

Is there one way to open unknown files?

Many files contain only simple text data. It is possible that while opening unknown files (e.g. XLSX) with a simple text editor like Windows Notepad will allow us to see some of the data encoded in the file. This method allows you to preview the contents of many files, but probably not in such a structure as a program dedicated to support them.

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