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Unlock PDF Synonym:

Another way to say unlock PDF is decrypt PDF, or unprotect PDF.  So when you have unlocked a PDF file, you have also removed the PDF security or removed the PDF password.

How to Unlock PDF Files:

PDF Unlocking is the process of removing the PDF file password protection.   If a PDF file is unlocked, everybody has complete access to the PDF file.   An admin password must be used in order to unlock a PDF file, and a user password cannot be used to unlock a PDF file.   The image below shows how a PDF document is unlocked with a password.

A PDF file before unlocking

A Locked, Password Protected PDF File

Remove PDF protection
  
The PDF file is decrypted and no longer password protected

An Unlocked PDF File

As shown above, a PDF file can be unlocked with a password to eliminate any access restrictions.  From this point on, the PDF file us unprotected and anybody can access this file.  Another way of saying this is the PDF security can be eliminated when you remove the PDF password  A unprotected PDF file can also be locked again to provide access limits if the admin password is used.

PDF Prime can Unlock a PDF File Easily!

PDF Prime can instantly unlock a PDF file or unlock multiple PDF files at once with a single admin password.   Try PDF Prime risk-free for 30 days.  Download PDF Prime