The primary goal of GuaPDF is to
remove restrictions (a.k.a. remove permissions password) on any secure PDF document (you should have the right to do it, for example, if you forgot the password). Any Acrobat version up to 9 is supported, even with 256-bit AES or 128-bit RC4 encryption. PDF restrictions removal is an instant process. Unlocked file can be opened in any PDF viewer without any restrictions so you may edit/copy/print it.
GuaPDF can be also used for
remove the PDF open password (a.k.a. user password). Decryption of the file with password for opening is guaranteed for PDF files with 40-bit key only (Acrobat 3, 4 compatible encryption). This process takes 1-2 days on one modern desktop computer.
Only standard PDF security is supported, neither third-party plug-ins nor e-books.
Advantages of GuaPDF are:
- Guarantee of removing restrictions regardless of password and encryption type used
- Newest PDF 1.7 ExtensionLevel 3 (Acrobat 9) files support, including AES encryption, Unicode passwords, compressed files and unencrypted metadata
- Removal of some restrictions in signed or certified files by digital signatures and in PDF forms
- Very high speed (40-bit key searching procedure is optimized for Pentium II/III, Pentium 4, Core 2 and AMD architecture, as well as NVIDIA GPU cards)
- Versions for dual/dual-core/quad-core/multi-GPU processors and network distributed version to use power of distributed clients
- Portability (DOS, Windows, Linux, Solaris, Mac OS versions are available)
- Running in GUI and keeps running in batch mode (as command-line utility)
- GuaPDF is the first PDF password removal software ever!
- Unlike most PDF password crackers, your PDF file is not altered in any way (except the decryption), even the file size is often the same. That minimizes the possible incompatibility of the unlocked PDF file.
- GuaPDF is the first and unique software with GPU acceleration of user password removal.
- GuaPDF has special support of PDF forms.
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