A file with the XLSX file extension is a Microsoft Excel Open XML Format Spreadsheet file. It's a ZIP-compressed, XML-based spreadsheet file created by Microsoft Excel version 2007 and later.

XLS files are Excel workbook files created in Excel 97 or Excel 2003. The 2007, 2010 and 2013 versions of the program use the XLSX format by default to save workbooks, but can also use the XLS format.

Of course, it’s incredibly easy to edit .xlsx files on your Mac using Microsoft Excel for Mac – open the software, select the Browse tab on the left-hand side of the pop-up window that appears ...

If your Excel files are opening in Notepad on Windows PC, here's how you can reset the settings to make .xls, .xlsx, etc files open in Excel.

Here's how Open your file in Excel. From the Office tab, select Save As., In the new dialog box select your preferred file type, such as cvs or txt and click OK. You will receive a warning that (your ...

For excel XLSX file types for Excel 2007 files, start with the step where you click on the "Advanced" button and repeat. You need to change these variables for both file types to correct the problem.

The Numbers tool for Mac allows users to export .numbers file or any other spreadsheet to Excel-compatible file format. If you have a .xlsx file, you can open it with Excel for Windows.

I have a password protected xlsx file that somehow became corrupt. <BR><BR>I've tried the automatic repair feature in office 2010 with no luck. I've also tried various excel recovery programs that ...