I have a bunch of PDF eBooks with copy protection on my pc. It’s inconvenient for me to print or edit. I ever meet a PDF document which could be opened or copied, but there were a couple of pages that I could't open. Learn more: http://www.epubor.com/how-to-remove-password-protection-from-pdf-files.html

1. How to Remove Password Protection from PDF Files
Posted by Jonny Greenwood on 3/4/2014 12:18:40 AM.
I have a bunch of PDF eBooks with copy protection on my pc. It’s inconvenient for
me to print or edit. I ever meet a PDF document which could be opened or copied,
but there were a couple of pages that I could't open. I could see them on the
bookmark toolbar and click them, but it won't show up the pages. So I will share
how to remove PDF password security restrictions on printing, editing, and
copying a PDF file with readers.
Difference between user password and owner password
The user password is known as a document open password. Users must type in
the password you specify to open the PDF for viewing, editing, printing etc.
The owner password is known as a master password or Permissions password.
Recipients don’t need a password to open the document. But they must type the
permissions password to set or change the restricted features. For an instance,
when you convert password protected PDF files to EPUB format, the Calibre will
alert a window to forbid you to change files type as follow.
Remove password protection on PDF files
Epubor PDF Password Remover, remove PDF password and restrictions with user
password or owner password. No quality loss on the original files. It helps you to
crack PDF password to access previously PDF without restriction.

2. There are two cases worthy of us to introduce how to fulfill break PDF password
step by step.
Case 1: PDF files have both user password and owner password
Case 2: PDF files have an owner password only
If PDF files have both user password and owner password, users should input the
right user password. Then all locks and restrictions will be removed.
1 Run PDF password Remover
Download Epubor PDF Password Remover above, install and launch it.
2 Add PDF files
Click “Add Files” button to import PDF files in the explorer or drag files into the
program interface. It’s a locked PDF file as the icon displays in the below.

3. 3 Crack PDF password
Click “Start” button and it will pop up a window to prompt you to enter a user
password in order to remove all password restriction. Make sure you enter the
correct the user password for pushing “OK” button.
Then click “Start” button again and it decrypts the PDF files successfully. Select
“Open” next to the “Start” button in the bottom. It will navigate you to find the
PDF files. Next time you open PDF files and edit it without entering passwords any
more. It simplifies boring procedures to open PDF for reading. Now try to edit or
print a password protected PDF file with this easy-to-use PDF cracker.
Epubor software supports decrypting PDF password in batch. And the protection
removal process won't hurt the original file's quality at all.
If PDF files have an owner password only, Epubor PDF Password Remover is able
to remove the restrictions without inputting any password. The process of
unlocking secured PDF files is similar with the first case above except for entering
the user password.
This PDF is generated upon this page: http://www.epubor.com/how-to-removepassword-protection-from-pdf-files.html, and the original author is Epubor.