I seem to remember an "offical" site (perl.org or cpan.org) which had a POD previewer. One uploaded a file and it would display the contained POD as it would appear on CPAN. Does someone have this link. I can't seem to find it.
metacpan.org's online POD preview is at https://metacpan.org/pod2html. Either paste the POD in the textarea or click the "Browse for file .." button, select the POD file you want to preview (which may be a .pm file including Perl code) and click "Render".