Take the 2-minute tour ×  Why are the changes that I made in a
CSV file not saved? For example, I change the style of a cell to
"Numbers". I save the file, but when I open the file again, the
changes aren't saved.  share|improve this question  3 Answers 3
up vote 8 down vote accepted  CSV files contain only data, as
comma-separated values. If you want to keep your formatting
changes, save the file as an Excel file (i.e. myfile.xls), using
the 'save as' file menu option.  share|improve this answer Even
more: I'm quite sure Excel warns about that when saving...? – 
Arjan Dec 25 '09 at 11:22  Because csv only contains data, not
style. If you want to save style save as .xls.  share|improve
this answer  CSV files can't contain styling. Any styling you
apply will only exist for that editing session.  If you want to
preserve styling, save in a different format, such as XLS.
share|improve this answer  Your Answer