fold: Wrap Text File / Line / Words To Fit in Specified Width This demonstrates a bash command line tool, an equivalent php tool would be wordwrap. fold is really nifty command line utility to make a text file word wrap. This is useful for large number of text files processing. There is no need to write a perl / python code or use a word processor. fold command syntax fold -sw {COUNT} {input.txt} > {output.txt} Wrap input lines in each input.txt, writing to standard output.txt. Where, -s : break at spaces -w : {COUNT} use COUN} as WIDTH columns instead of default 80. For example, following command will wrap input.txt at 60 width columns: $ fold -sw 60 input.txt > output.txt A large number of files can be processed using a shell loop: for i in *.txt do fold -sw 65 $i > $i .output done