Guaranteed PDF Decrypter 3.3

for Windows, Linux, Mac OS with GPU support

DOWNLOAD FREE DEMO   SPECIAL OFFER
New 3.3 version! 50% discount
 

 PDF restrictions remover 

 PDF open password remover (40-bit) 

 PDF open password recovery (128 or 256-bit)

 User's opinions 

 

How to remove security from secured PDF file


PDF security overview

There are two types of secured PDF documents: your file can ask for password when opening the document, or, your file opens normally, but some operations are restricted (e.g, printing or editing) and requires password for unlocking it. The first password is known as document open (or user) password, and the second is permissions password (also known as a master or owner password). Adobe Acrobat uses different algorithms to apply PDF security with 40, 128 and 256 bit keys.

  • PDF restrictions are insecure and permissions password could be removed instantly.
  • If open password uses 40-bit keys (Acrobat 3 compatible encryption), it also could be removed with guarantee.
  • Searching for open password with 128 or 256-bit PDF encryption is only possible using PDF password recovery software.

Guaranteed PDF Decrypter purpose

The primary goal of GuaPDF is to
  • remove restrictions (unlock) of any secure PDF document (you should have the right to do it, for example, if you forgot the password). Any Acrobat version up to X 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 or print it.

GuaPDF can be also used for
  • remove PDF open password (a.k.a. user password). Decryption of the file with password for opening is guaranteed for PDF documents with 40-bit key only. This process takes 1-2 days on one modern desktop computer and could be accelerated on GPU.
Only standard PDF security is supported, neither third-party plug-ins nor e-books.

This is GUI utility for Windows and command-line (CLI) utility for Linux, Solaris/SunOS, Mac OS X.

Features

Advantages of GuaPDF are:
  • Guarantee of removing restrictions regardless of password and encryption type used
  • Newest PDF 1.7 ExtensionLevel 8 (Acrobat X-XI) 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 modern Intel Core and AMD architecture
  • GPU acceleration on modern NVIDIA and NEWATI/AMD cards using CUDA and OpenCL technology
  • Versions for quad-core/multi-GPU processors and network distributed version to use power of distributed clients
  • Portability (DOS, Windows, Linux, Solaris, Mac OS X versions are available)
  • Running in GUI and keeps running in batch mode (as command-line utility)


Unique GuaPDF features

  • GuaPDF is the first PDF password remover software ever!
  • Acrobat X encryption support
  • 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.
Designed for NVidia CUDA Designed for OpenCL
 
 

GuaPDF versions and price


There are some GuaPDF versions:
  • DEMO (freeware) version. It demonstrates processing of both security methods but has some limitations and can correctly decrypt only small files. It also doesn't contain distributed computing mechanism.
  • GuaPDF restriction remover. This version can remove restrictions on PDF files (remove permissions passwords), and can't decrypt files with open password. (from $/€25)
  • GuaPDF password remover. This version process both security methods (i.e. open and permissions passwords), and supports up to Quad-core CPU and/or one GPU card for fast 40-bit key searching. (from $/€39)

All these version are licensed for non-commercial purposes only. If you wish to use GuaPDF to make any profit you should use
  • Distributed UNLIMITED, most powerful version. It does everything, has no limitations, support any number of CPU/GPU clients and distributed processing ($/€150)

 
Version Restrictions removal,
Acrobat 3.x-11.x up to 256 bit key
Key searching Distributed mechanism

License Maximal time to decrypt Price
 RC4 encryption (40 and 128 bit key)  AES encryption (128 and 256 bit key) Acrobat 3.x, 4.x, 40-bit key On Core i5 On AMD Radeon 7770
 
Demo YES (only small files) YES (only small files) YES NO (single computer) Freely distributable 4 days 12 hours FREE

Restrictions remover Instantly Instantly NO NO Non - commercial - - $/€25

Password remover Instantly Instantly YES YES, 4 clients max. Non - commercial 1 day (on 4 CPU) 12 hours $/€39

Unlimited Instantly Instantly YES YES, any number of clients Any purposes (except distribution) The more clients the faster $/€150
 
 
 

GuaPDF download and order  



You need GPU version only if you have modern GPU card and searching for open password!

 

Normal version (for CPU)

Version with GPU support


Win32, Win64 NEW GuaPDF v. 3.3 Free Demo for Windows, GUI version, CPU client (350K)
GuaPDF v. 3.3 Free Demo for Windows, GUI version, OpenCL client (360K)

GuaPDF v. 3.3 Free Demo for Windows, command-line version, CPU+GPU clients (250K)

Here is the installation instructions with screenshots.
If you got error message like "The application has failed to start because the application configuration is incorrect" you should install Microsoft Visual C++ 2005 Redistributable Package

Linux NEW GuaPDF v. 3.3 Free Demo for Linux, CPU+OpenCL clients (ELF, 1.5M)

Mac OS X NEW GuaPDF v. 3.3 Free Demo for Mac OS X 10.5.x, 10.6.x, 10.7 (Leopard, Snow Leopard and Lion, Intel only!, command-line + applescript, CPU + OpenCL clients, 1500K)

Solaris GuaPDF v. 3.0 BETA DEMO for Solaris 10 x86 (1M)
 

Please test your file before purchasing using DEMO version

Order the commercial versions over the Internet worldwide using secure connection. This means no one (including us) can intercept your confidential information. The temporarily link to the fully functional version you receive immediately after verifying your order. Normally you'll get the program within 10-15 minutes.


  Service #1, ShareIt (preferred) Service #2, RegNow (if you can't use #1 for some reason)

Name and address ShareIt! element 5 AG Vogelsanger Str. 78 D-50823 Cologne Germany Register Now! P.O. Box 1816 Issaquah, WA 98027 USA

Link Order GuaPDF 3.3 commercial
Order GuaPDF 3.3 commercial

Connection Secure Secure

Credit cards Visa, MasterCard/Eurocard, American Express, Diner's Club, JCB Visa, MasterCard/Eurocard, MasterMoney

Other methods Bank/wire transfer, check, cash, paypal Wire Transfers, Check/Money Order, Phone, Fax, Invoice, Open Invoice (European), Purchase Order, PayPal

  More info More info


Upgrade from 2.x to 3.x for $/€ 12.95 here.
Upgrade is free to all 2008 year customers and for all customers how can set a link as written here.
Windows screenshot



Mac screenshot
 
 
Customer's FAQ

  • Q. I got the error message when starting GuaPDF: "The application has failed to start because the application configuration is incorrect."

    A. Try to install Microsoft Visual C++ 2005 Redistributable Package

  • Q: How to use my GPU card?

    A: GPU acceleration is used only if your file has password to open with 40-bit key. Also, you need modern NVIDIA (from 8000 series) or AMD/ATI Radeon (from 5000 serie) and the latest OpenCL drivers.
    Under Mac OS X 10.6 (Snow Leopard) you may need to boot in 32-bit mode.

  • Q: What version should I choose?

    A: If can open PDF file, but can not print, edit etc, get the restriction remover version. If you can't even open file, first of all you need to test your file (using DEMO version) if it has 40-bit key encryption. If yes, you may choose any version depending of number of computers you've got.

  • Q: I've tested GuaPDF DEMO on my file, but got only blank pages (or some errors)

    A: DEMO version can process small files only. In fact, unlike other PDF decrypion software, GuaPDF don't change anything in your file structure, it only decrypts all encrypted streams and strings. That's why the decryption is guaranteed: your file is not modified (even the file size is often the same after decryption). DEMO version has only one possible limitation: it decrypts only few streams, all others streams remain encrypted. So, if the large files contains more streams than DEMO limitation, the decryption may cause any errors and blanks (non-decrypted) pages.

  • Q: Ok, but how can I sure the full version will work on my file?

    A: If DEMO version parses your file with no errors and the key is printed, the full version will work fine, because the decryption with known key is trivial.

  • Q: Ok, how long will it take?

    A: Restriction removal is instant (may be few minutes on very large files). To estimate key searching time, run DEMO version (and divide it to the number of your PCs/CPU cores).

  • Q: Are non-standard security handlers supported?

    A: No, please run DEMO to make sure your file is supported.

More questions and answers you'll find in the included documentation and here.
 
 
 
Support

Only legal customers are supported. No claims and question about freeware version will be accepted, but I'll appreciate the constructive feedback. Also contact me if you have any