Guaranteed Excel Decrypter (GuaExcel)

This is an utility to:

• decrypt any Excel 97/2000 files with password for opening and
• decrypt Excel XP/2002/2003 files in default (40-bit) encryption mode.

Do not use it for:

• decryption of Excel files versions prior to 97 (8.0)
• French Excel (any version)
• files using new Office XP/2003/2007/2010 encryption with 128-256 bit key length. Please look at fast, GPU-enabled MS Office XP/2007 password recovery software
• finding read-only, workbook and other passwords. In this case look at the other page to find necessary utility.

This is a command-line utility for Win32 and Linux (DOS version can still also be obtained).

Please note this program will not recover your password, but it can remove any-length, any-language password from your document. Why? Because is not usual password recovery software.

It's well known that MS Office 97/2000 (as well as Office XP/2003 in default mode) uses encryption with 40 bit keys. So, you need to test only 2⁴⁰ (about one trillion) keys to decrypt your file with guarantee. GuaExcel does it, and key testing will take less than 1 day on the PC with modern video card. Within this time (and in average within the half of this time) ANY file, encrypted with ANY password (no matter what length of the password is or what language or symbols used, etc) can be decrypted.

Moreover, GuaExcel offers SMP/distributed computing mechanism (via the shared directory) and you get the result even faster if you've got multi-core system or several computers connected in Local Area Network.

Advantages of GuaExcel are:

• 100% guarantee of decryption regardless of password used
• Very high rate (optimized for Celeron/Pentium II/III/4/AMD/Core 2 architecture)
• Support of GPU computing using OpenCL technology. Multiple GPUs are also supported
• Support of distributed cracking on the network as well as dual/dual-core/quad/SMP computers
• Portability (Windows and Linux versions are available)
• Confidentiality (you crack your secret files, not someone from cracking service)
• Search for file-independent key, allowing to instantly decrypt files with the same password
• Decryption of file with known password (very useful for Office files recovery programs that don't support encrypted files)

• DEMO. The version demonstrates major GuaExcel features, but can process file with fixed password 'nyxo' only. It's FREE

Commercial versions include:

• 4 clients version. It contains full key searching and decryption functionality, but only on one (local) computer. Supports up to 4 cores and/or one GPU client. Best for individual users!
  
• 20 clients version has the special mechanism and the key searching is automatically distributing over several computers of your network.This version can also be used on local powerful computers - it supports up to 8 CPU cores and up to 8 GPU simultaneously!

All these version are licensed for non-commercial purposes only. If you wish to use GuaExcel to make any profit you should use

• unlimited, most powerful version with no limitations. It costs €/$150, but you can decrypt your file in minutes! (if you've got enough computers).

Download it to test your file and to estimate the decryption time on your computer:

GuaExcel v. 1.8 DEMO for Win32/Win64 (300K)
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

GuaExcel v. 1.7 DEMO for Linux (ELF, CPU + GPU clients, 400K)
 

Order the commercial versions over the Internet worldwide using secure connection. This means no one can intercept your confidential information. (Please note I also don't have an access to this information because card will be charged by ordering services listed below). 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.

More questions and answers you'll find in the GuaExcel FAQ.

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 problems with ordering the program.

Please send any comments and bugs to software@password-crackers.com In case of the bug reported I'll update program as soon as possible.

You may submit your opinion/read other opinions here.

1.8a:

• OpenCL support of most NVIDIA and AMD GPUs

1.7:

• NVIDIA CUDA support - up to 8x speed-up on GTX 2xx cards

1.6a:

• "Permission denied" bug on Windows Vista fixed
• 4-clients version instead of 2-clients, 20-clients instead of 5 and 10-clients

1.6:

• 25% speed-up on Core 2 chips. The theoretical value of 1500 ticks per password has been beat.
• /s option is available in all versions

1.5:

• 25-35% speed-up on Pentium 4 and AMD, a little bit on Pentium III. /f option is now obsolete.
• Kernel crypto function for any processor now can be easily added and the best rate functions are choosen automatically.
• Interruption by Ctrl+C bug on multiprocessor and P4 HyperThreading computers fixed.
• 2-clients version instead of 1-client (for the same price) to use the power of dual/dual-core processors.

1.3:

• Full Win32 console application (DOS version still may be obtained)
• Pentium 4 optimization
• More accurate estimated time calculation

1.22:

• Bug in parsing of write-protected files fixed
• File corruption test added

1.2: (versions 1.0, 1.1 skipped to remain compatibility with current GuaWord version):

• First client now can be considered as "server". The decryption is performed on this client only. New /1 option. (Network versions)
• New /p option to decrypt files with known password.
• Linux version available.

0.9:

• First (BETA) version released.

Last updated: