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-f, --filter=FILTER

Filter source script(s) with a PAR::Filter subclass. You may specify multiple such filters.

If you wish to hide the source code from casual prying, this will do:

% pp -f Bleach source.pl

If you are more serious about hiding your source code, you should have a look at Steve Hay's PAR::Filter::Crypto module. Make sure you understand the Filter::Crypto caveats!