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.
Software that will open, convert or fix XLSX files
Try a universal file viewer
In addition to the products listed above, I would suggest that you try a universal file viewer like Free File Viewer. It can open over 200 different types of files - and very likely yours too! Download Free File Viewer.