Potfile format - to hex or not to hex

Are there any utilities to convert passwords in a pot file to all hex or all plaintext?

For example, if I have a potfile and it has mixed entries for found passwords and some look like $HEX[hexcharactershere], is there a way to convert those to their plain-text equivalent?

Related to that, would converting from hex to ascii be problematic if some CR/LF/NUL characters are present?
See here: https://hashcat.net/forum/thread-2483.html

Similarly, is there a way to convert all plaintext entries from a potfile to all $HEX[] format?

For hex to ascii conversion, this will do in a pinch (not tested):
From https://hashcat.net/forum/thread-3522.html
perl -ne 'if ($_ =~ m/\$HEX\[([A-Fa-f0-9]+)\]/) {print pack("H*", $1), "\n"}'

But what about ascii to hex?

I will probably write something if this doesn't exist.