Try renaming the file with the correct extension (e.g., .xlsx for Excel workbooks). If needed, open the file in Excel, save it as the correct format, and close it to apply changes.

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 ...

How to Convert DAT to Text in Excel. DAT files are files with an extension that isn't associated with a specific application or program and can be almost any type of file including video, media or ...

Excel ignores the quotation marks when it opens your CSV file. Jane Roe's record thus reads "Roe","","Jane" If you accidentally skip a field, your data won't line up in the proper columns in Excel.