If you want your Perl files to be invisible, Acme::Bleach hides all of your source code by encoding it as white space: <a href="http:&#x2F;&#x2F;www.perlmonks.org&#x2F;?node_id=967004" rel="nofollow">http:&#x2F;&#x2F;www.perlmonks.org&#x2F;?node_id=967004</a>