Decryption is being done instantly. Decrypted file can be opened in any PDF viewer (e.g. Adobe Acrobat Reader) without any restrictions - i.e. with edit/copy/print functions enabled.
All versions of Adobe Acrobat (including 5.x, which features 128-bit encryption) are supported. 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).

PDF Password Remover features
+ Easy to use;
+ Support drag and drop PDF files;
+ Do NOT need Adobe Acrobat software;
+ Support Windows 98, ME, NT, 2000, XP, 2003, Vista systems;
+ Support both 32bit and 64bit systems;
+ Remove the security settings from your encrypted PDF file is instant;
+ Support command line operation (for manual use or inclusion in scripts);
+ Support PDF1.7 format (formerly only supported by Acrobat 8.0 application);
+ Support PDF1.7 (Acrobat 8.x) files, including 40-bit RC4 decryption, 128-bit RC4 decryption, AES decryption, compressed files and unencrypted metadata;
+ Batch operation on many files from command line;
+ Support Adobe Standard 40-bit Encryption, Adobe Advanced 128-bit Encryption and AES Encryption;
+ Decrypt protected Adobe Acrobat PDF files, removing restrictions on printing, editing, copying;