I have a locked PDF file that I would love to print out (definitely for my own use, I am a student and think this would be so fantastic to help me study this semester). Is there a way t o unlock it? Or at least print it out? --lily
Have you ever been troubled with the same problem? Well, it is a very common situation in our daily life. For some copyright reasons, many PDF files like academic papers or network magazines are password protected to restrict others from copying, editing, and printing. If you want to reuse a protected PDF file without knowing the password, you need unlock PDF first.
How to unlock a secured PDF file? Here, I would like to recommend you a great PDF tool – Doremisoft PDF Password Remover. It is an excellent PDF Unlocker to help you remove password and restrictions for locked PDF files. This tool provides Windows version (PDF Password Remover) and Mac version (PDF Password Remover for Mac) to meet different user experience.
How to Unlock PDF on Windows/Mac OS
Doremisoft PDF Password Remover is extremely easy to use. Here we take the Mac version for example to show you how to unlock PDF in three simple steps:
Step 1: Add File to PDF Unlocker Mac
Click the “Add Files” button to import secured PDF files to PDF Password Remover for Mac. 
Step 2: Select the Output File Folder
Select the “Save target files in source folder” or “Customize” to set the output file folder.
Step 3: Unlock Protected PDF File on Mac
Press the “Convert” button to unlock the input password protected PDF files in seconds.
Sometimes you get a PDF file that is password protected. Doremisoft PDF Password Remover is a utility that helps you to unlock PDF file without knowing the password. After that, you can freely open, or copy, edit, and print password protected PDF file.
Below is a video to show you how to unlock secured PDF file step by step on Windows:
