PDFKey Pro software allows you to unlock PDFs with ease on both Mac and Windows. You can regain access to lost copying and printing PDF passwords and make unlocked copies of PDFs without inserting passwords.

PDFKey Pro is incredibly easy to use – all you need to do is drag one or more files or an entire folder onto the PDFKey Pro. It's so versatile that you can even use it in shell scripts. Once you do that, PDFKey Pro will read your PDF files with printing or copying passwords set, and then create exact replicas of the PDFs but without the passwords. For PDF files that have a viewing password set, PDFKey Pro will read your PDF file and create an unlocked exact replica of the PDF by removing the password. However, you'll need to supply this password beforehand.
Locking documents with PDFKey Pro is just as effortless as unlocking them. The software prompts users with a dialog to set their passwords, and an exact but protected copy of the PDFs will be created.
With PDFKey Pro's included command line tools, inserting PDFKey Pro into complex workflows is not a problem at all. The software can process entire folders of PDF files without user intervention, making it a powerful tool for those who deal with PDF files regularly.
It's worth noting that PDFKey Pro is not compatible with DRM'ed eBooks from eStores. However, it is designed to help users work with PDF files when they've lost their password, or when they need to process their PDFs all at once. PDFKey Pro is not designed to crack DRM.
In conclusion, PDFKey Pro is an outstanding piece of software that provides considerable ease when dealing with password-protected PDFs. Regardless of what you use it for, it's worth trying out, and if you like it, the cost of the license is not unreasonable.
Version 4.3:
* Update embedded JRE to version 8u92
* Bugfixes