Change Linux style LF line endings to Windows style CRLF on the command line with the free Swiss File Knife for Windows, Mac OS X and Linux.

sfk lf-to-crlf [options] dir .ext1 .ext2 [-to outmask]

convert just-lf (unix) text format to cr+lf (dos/windows).

if only a single filename, or list of filenames, is given
then these are converted immediately.

if a directory parameter is given then the command runs
in simulation mode, requiring option -yes to convert.

   -forceend    if a file is changed and rewritten then
                also add a line ending at the last line
                even if there was none in the input file.
   -writeall    rewrite all files no matter if changed

   sfk addcr    same as sfk lf-to-crlf

see also
   sfk remcr    convert crlf to just lf
   sfk listle   list line end infos for files

web reference

   sfk addcr . .csv
      add crlf on all .csv files in current folder.

   sfk addcr src .cpp .hpp
      add crlf on all .cpp and .hpp files within src.

   sfk select -dir doc -file .txt +addcr -to tmp\$file
      add crlf on all .txt files within doc, saving to tmp.