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.

If you have an old Excel spreadsheet, Excel opens it in normal view, which might be risky at times when it is downloaded from an unknown source. As many people Unblock the downloaded file without ...

If you use Microsoft Excel on your Mac, you can save the spreadsheets you create and open them in Numbers, Apple’s spreadsheet app. It’s a handy feature to use in case you can’t access Microsoft’s ...

When you're creating spreadsheet documents to track employee IDs, forecast sales or compare products, you may want to prepare your data in another program and open the resulting file in Microsoft ...

All details in this article are correct as of October 7, 2025. Accessibility to some of the latest Excel features depends on ...

Spreadsheets created in Apple Numbers can be wondrous things, but opening them in Excel on a Windows PC is something of a headache. It can be done, though, with a little help from iCloud. In this ...

Q. Help! I have been working on a very important Excel file for a client, and suddenly my computer locked up and says, “Excel is not responding.” Is there anything I can do so that I don’t lose all of ...

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