If the DAT file you're trying to open is text, you can convert the file into text in the Microsoft Excel program by first saving it as a CSV file.

Converting texts between formats is a bit of a pain to do on a file-by-file basis, but thankfully, MacIssues shows how to convert text files in bulk using a simple terminal command.

Learn how to import or export data from a Text file to convert a Text (.txt or .csv) file into an Excel (.xlsx) spreadsheet easily using this procedure.

A CSV (comma-separated values) file is a text file in which information is separated by commas. CSV files are most commonly encountered in spreadsheets and databases. You can use a CSV file to ...

How to Convert a File From ANSI to UTF8. ANSI and UTF-8 are two types of text encoding. The former is the default encoding that is used when you save text files created in Notepad, the text editor ...