Guaranteed PDF Decrypter (GuaPDF) for Windows

Used Guaranteed PDF Decrypter (GuaPDF) for Windows?

Editors’ Review

Download.com staffOctober 29, 2013

The software world is full of PDF utilities from the four corners of the globe. PSW-soft's Guaranteed PDF Decrypter (GuaPDF) is an example; its developers' page is called Russian Password Crackers, which sounds like something out of the Cold War but in fact is a group specializing in cryptosecurity. GuaPDF is designed to remove various restrictions from PDF files, up to 256-bit key encryption, and to decrypt 40-bit key passwords of any length in any language. It can also harness the processing power of Nvidia CUDA-capable graphics cards to accelerate decryption.

GuaPDF downloads as a ZIP file but opens immediately and runs locally on your PC; there's no need to install anything. This compact program doesn't modify the files it handles in any way, which is part of the decryption guarantee. Right-clicking its System Tray icon accesses the program and an option to choose the decryption's priority in accessing system resources. The interface itself is about as basic as it gets, just a PDF-based interactive dialog with File, Options, and Help menus, progress bars for the key space and the current key, and a main display. We tried several PDFs; GuaPDF quickly identified all characteristics, but the free demo version wouldn't fully decrypt the larger files. Smaller files decrypted instantly, though.

You don't need to be an industrial spy to require PDF decryption; all you need to be is forgetful. We tested GuaPDF in both Windows 7 and Vista with excellent results. It's available in several licensing configurations for regular and commercial users.

What’s new in version 3.2

Version 3.2 includes OpenCL support for NVIDIA and AMD GPU cards.

Guaranteed PDF Decrypter (GuaPDF) for Windows

Used Guaranteed PDF Decrypter (GuaPDF) for Windows?

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Full Specifications

GENERAL

Release: January 23, 2012

Latest update: October 29, 2013

Version: 3.2

OPERATING SYSTEMS

Platform: Windows

Operating System

Windows XP
Windows 7
Windows 2000
Windows 2003
Windows Server
Windows 10
Windows Vista

Additional Requirements: None

POPULARITY

Total Downloads: 72,118

Downloads Last Week: 4

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Last Updated

User Reviews

1.8/5

5 User Votes

Can remove PDF restrictions
cnet1234/January 21, 2018
Pros
I tested this software against two PDF files with restrictions, meaning you can open the file but not print or edit it. The free version will remove the restrictions, but leave you with only the first page of the PDF. I can only assume that it will work with multi-page PDFs. I do not know how anyone can call this "free." I think bait and switch would be more appropriate. I subtracted 2.5 stars for false advertising.
Cons
This software can only work against 40bit encryption for password protected PDFs. The Adobe standard since 1.5 is 128 bit, which makes this functionality worthless. I subtracted two stars for this.
Summary
Worked for me on file with 256 bit encryption
lawgeMay 12, 2012
Pros
Worked for a large Acrobat X file with 256 bit encryption. File fully useable now. I tried the demo first. The demo identified all encryption. So I had some confidence that the full product would decrypt the entire file. Nice that it runs stand-alone.
Cons
I didn't find any issues.
Summary
Did not work for the file I tried
divedoggOctober 21, 2008
Pros
Did not work for the file I tried
Cons
I tried several of these protection remover programs on a pdf file. Apparently the file is encrypted in a way that these programs cannot handle. This software gave me an error msg saying that the file uses 128 bit encryption which is not supported.
Summary
Did not work for the file I tried
Hard to Evaluate
battlepointNovember 24, 2007
Pros
Cons
Trial version stops at line 118 which may means that it might not even decrypt a page.
Summary
Don't waste your time
tlesaul2August 13, 2006
Pros
Cons
trial decrypts 1 page --- poorly.
Summary

Developer’s Description

By Guaranteed Software

Remove restrictions and/or password on PDF files.

This is a GUI utility which allows you to instantly remove various operation restrictions on PDF files, such as printing and editing (even with 128 or 256 bit key, Acrobat 8.x-10.x AES encryption and compressed files supported). It also can decrypt PDF files with password for opening (40 bit key only)