Having problems opening a XLSX file?

We have programs that can open or convert your XLSX files.

Opening XLSX files

Did your computer fail to open a XLSX file? We explain what XLSX files are and recommend software that we know can open or convert your XLSX files.

What is a XLSX file?

Files with the .xlsx extension are Microsoft Excel files that have been created using Microsoft Excel versions 2007 and later. Previous versions of Excel that were created prior to 2007 saved these spreadsheet documents in .xls format. The 2007 and later versions of Excel use the Office Open XML Format, creating the .xlsx extension.

The new Microsoft Excel technology combines XML formatting with document compression features, making the files more manageable to the end user. Up until the introduction of the .xlsx format, .xls was the most common extension used for document spreadsheets. As the later versions of Excel become more widely used, the .xlsx format will increasingly take its place.

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About File Extension XLSX

File.org aims to be the go-to resource for file type- and related software information. We spend countless hours researching various file formats and software that can open, convert, create or otherwise work with those files.

If you have additional information about the XLSX file format or software that uses files with the XLSX suffix, please do get in touch - we would love hearing from you.