sed command to collapse whitespace

I'm trying to write a sed command to collapse white space (tab, newlines, spaces, etc.) and whittle consecutive characters down to one space.

I tried:

Code:sed "s/\s+/ /gm" infile.txt >outfile.txtand also:

Code:sed "s/\s{1,}/ /gm" infile.txt >outfile.txtbut both have no effect on whitespace in the input. So much for walking with sed.

Thanks in advance for any help you can provide.