File Extension XLSX

  • Full name
    Microsoft Excel 2007, Excel 2010 And Excel 2013 Open XML Workbook Format
  • Developer
  • Popularity
Have you encountered a problem with a XLSX file? Don’t you know which program opens a file with this extension? You will find all the information you need about working with a XLSX file here. In the further part of this page we have added a list of programs that should open your XLSX file. It is enough you choose a proper application for your operating system, download and install it.


The file extension XLSX is the latest version of the Microsoft Excel xls file format. The XLSX format will be supported starting with the 2007 version of the spreadsheet program used worldwide. The file extension XLSX means Excel Spreadsheet Xml, Excel spreadsheet in XML format.

An XLSX file contains formatting instructions, formulas and graphics in addition to the table cell values, but no macros. Files containing macros are automatically given the extension xlsm.

XLSX is an XML based file format (Office Open XML) that is not legible with older versions of Excel. For the Office versions 2000, 2003 and XP, however, this functionality can be upgraded using the Microsoft Office Compatibility Pack, whereby the result of a read-in XLSX file does not always have to be 100% identical to the original.

Office Open XML is an open standard developed by Microsoft for office applications, which is intended to ensure the file exchange between different office suites.

An XLSX file consists of several XML files, which are automatically summarized as archives when saved using the ZIP algorithm. This saves space compared to the old format. Other benefits include better data integrity and easier data recovery in the event of data loss.

Programs which can open a XLSX file

How to open a XLSX file? Advice and guidance

Absolutely most often appearing reason that prevents you from opening the XLSX file is the lack of a proper application to support it in your operating system. It is notably the first thing you need to address. When one of the programs to support a XLSX file from the list is already installed, you can try to rerun the file. The system should display a message asking you to choose a primary application to support XLSX files. At this point we are looking for disk space where the application was installed in and we can link it with a XLSX file. Since then, our operating system will use the selected program to support all XLSX files.

Other issues

Despite the described problem with XLSX there may be many more problems. If the existing operations were not effective, get involved with the following matters:

- verify that the XLSX file is not damaged and that it has been downloaded or copied in whole
- verify that the file has a file extension that has not been intentionally changed (for example, if it do not contain other information than its extension suggests)
- make sure again whether the XLSX file type is linked in the operating system with a proper program
- make sure that the file is not infected with a virus and you have up to date software and drivers.

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