What Is XLSX File Format? How to Open and Convert XLSX File?

This article will explain what an XLSX file is, how to open it, and what software can convert them to other spreadsheet formats, such as CSV or ODS.

xlsx file

What is XLSX file format?

A file with an XLSX extension is a file of Microsoft Excel Open XML Format Spreadsheet. It is a ZIP archive of spreadsheet files created by Microsoft Excel 2007 and above based on XML.

The XLSX file stores the cell editing data in the worksheet, while the worksheet is stored in the spreadsheet (the file contains multiple worksheets). The cells in a spreadsheet are positioned in rows and can contain styles, formats, mathematical functions, etc.

Earlier versions of Excel spreadsheet files were saved in XLS format, and XLSM files are Excel sample files that support macro command functions.

How do I open an XLSX file?

Unless you have installed a software on your computer that can open XLSX files, you will not get any response when you click on XLSX files. Instead, you must have spreadsheet software installed on your computer in order to edit XLSX files.

Although Microsoft Excel (2007 or later) is the most common software used to open and edit XLSX files, you can also install Microsoft Office Compatibility Pack and use older versions of Excel to open, edit, and save XLSX files.

It also supports printing and copying data from XLSX files, which are features you will probably need.

If you don’t want to edit an XLSX file but just want to view its contents, you can install the free Microsoft Office Excel Viewer which also supports printing and copying data from XLSX files, which are features you should use.

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You can also open and edit XLSX files without Excel, for example using the completely free WPS Office Spreadsheets, OpenOffice Calc or LibreOffice Calc.

Also, if you’re using a Mac operating system, Apple Numbers supports opening and editing XLSX files, but you may not be able to use all of the features.

If you don’t want to install software, Google Sheets, Microsoft Excel Online, and Zoho Docs are free online applications that can open and edit XLSX files. However, to operate these tools, you must first upload XLSX files to the website before you can view and edit them.

If you are using Chrome web browser, you can install the extension Office Editing for Docs, Sheets & Slides, which allows you to open and edit XLSX files directly in your browser, drag and drop XLSX files from your computer to Chrome, and start editing them directly.

How to convert XLSX files?

If you have installed any of the aforementioned softwares. This can usually be done by using the menu option File > Save as.

For example, if you are using Excel, go to its menu FILE > Save As > Browse and select CSV, XLS, TXT, XML, etc. The F12 key should also open the “Save As” window directly.

Sometimes the fastest way to convert XLSX files is not to use the tools you have installed, but to use free file conversion software or online conversion tools, such as Zamzar or Convert Files.

With these two online conversion tools, you can convert any Excel file to various file formats, such as XLSX to CSV, XML, DOC, PDF, ODS, RTF, XLS, MDB, and even image and web file formats such as JPG, PNG, and HTML.

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Still can’t open XLSX files?

If you have tried all the suggestions above and the file still won’t open, then the most likely reason is that you are not actually working with XLSX files. This could happen if you simply glance at the subfile name and mistake it for an Excel file.

For example, your file may actually end in .LSX, which is a Streaming Media Shortcut file and has nothing to do with Excel, and Windows Media Player can open LSX files.

Similarly, it is easy to confuse it with an SLX file, but SLX files are also not related to Excel and are used in programs like Simulink and SpectraLayers. xlr is another subfile name that can be easily confused with Excel files.

Frequently Asked Questions about XLSX files

1. How to read XLSX files in R?

If you need to read XLSX files in R, first copy the file from Excel and import the file from the clipboard into R.

2.How do I read XLSX files in Python?

You can use the Python module oepnyxl to open XLSX files. After downloading the program, open Python and click Import to read the file data in XLSX.

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