Freeware PDF Unlocker, a free Windows utility, doesn’t do everything that commerical packages like those from Elcomsoft do, but it will help if you just need to unlock copy/paste and editing restrictions on a PDF. Simply drag a copy-protected PDF onto PDF Unlocker’s icon, and a new, non-protected copy will be created.

Link:
http://lifehacker.com/396534/…

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