Whitespacer
From Just Solve the File Format Problem
Whitespacer is a whitespace encoder/decoder. It reads from standard in, takes each of the four pairs of bits in each byte and encodes it as one of four whitespace characters: "\t", "\n", "\r", " " (space)
It then writes these whitespace characters to standard out.
It can then do the reverse, taking groups of four whitespace characeters and decoding them back into a single byte.
Here's what it looks like in Wireshark sending some encoded bytes through a TCP session:
