In my very old post, I have introduced a software which can unlock the encrypted pdf files (Click to have a view). Since so many days went by, some of you started to asked if there is any alternatives. Fine, there is one I can find for you. Appnimi PDF is a freeware which can make you unlock your encrypted pdf files.

Official site: http://www.appnimi.com/softwares/1-password-tools/1-pdf-unlocker

Features of Appnimi PDF Unlocker

• It is free
• Easy to use
• Support Windows 98, ME, NT, 2000, XP, 2003, Vista and Win 7 Systems
• Recovers user password required to open the file
• Brute-Force alogorithm are used to unlock the file
• Dictionary Attack using a word list can be used to unlock the file.
• The exe in the installation directory is portable
• With an elegant GUI the user can set the parameters easily before starting the recovery process
• Extract the files
• Unlocks any password protected PDF. Following permission are allowed on the unprotected pdf produced by PDF Unlocker.
  • Assembly
  • Copy
  • DegradedPrinting
  • Fill In
  • Modify Annotations
  • Modify Contents
  • Printing
  • Screen Readers
• The tool is completely portable as it is an exe.