Overview:
The standard security provided by PDF consists of two different methods and two different passwords. A PDF document may be protected by password for opening ('user' password) and the document may also specify operations that should be restricted even when the document is decrypted: printing; copying text and graphics out of the document; modifying the document; and adding or modifying text notes and AcroForm fields (using 'owner' password).

Key Features:
New PDF 1.6 (Acrobat 7.x) files support, including 64bit and 128bit encryption
Confidentiality (you crack your secret files, not someone from cracking service)
All versions through Adobe Acrobat 7.0 are supported
Decrypt PDF files protected with owner passwords
Instantly remove restrictions on copying, printing and other actions with the file
Full install/uninstall support
Support drag and drop PDF files
Do NOT need Adobe Acrobat software
Support Windows 98, ME, NT, 2000, XP, 2003 systems
Support PDF1.6 (Acrobat 7.x) files, including 40-bit RC4 decryption, 128-bit RC4
Decryption, compressed files and unencrypted metadata
Decrypt protected Adobe Acrobat PDF files, removing restrictions on printing, editing, copying

PDF Password Cracker is an utility to remove the security on PDF documents (of course, you should have the right to do it, for example, in case of forgotten user/owner password). Only standard PDF security is supported, neither third-party plug-ins nor e-books. Both protection methods are cracked:
1. Restricted operations on file can be disabled (instantly, any Acrobat version up to 7.x).
2. It also can be used to decrypt files you know password for.
Support PDF1.6 (Acrobat 7.x) files, including 40-bit RC4 decryption, 128-bit RC4
Instantly remove restrictions on copying, printing and other actions with the file
Do NOT need Adobe Acrobat software
Please note that PDF Password Cracker doesn't work with documents which have user-level passwords user-level passwords.