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.

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

Remove Security: The options vary depending on the type of password security attached to the document. If the document has a Document Open password, click “OK” to remove it from the document. If the document has a permissions password, type it in the “Enter Password” box, then click “OK.” Click “OK” once more to confirm the action.

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 unlock the PDF document, for example, if you forgot the password). Any Acrobat version up to Acrobat DC 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 old 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 DRM.
GuaPDF is GUI utility for Windows and command-line utility for Linux and MacOS.
Features
Advantages of GuaPDF are:

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• Guarantee of removing restrictions regardless of password and encryption type used
• Newest PDF 1.7 and 2.0 (Acrobat X, XI, DC) 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 when searching for 40-bit key on modern multi-core Intel Core and AMD architecture and, especially, on modern NVIDIA and AMD cards with GPU acceleration using OpenCL technology. On modern GPU it takes only few hours to remove ANY open password with 40-bit key.
• Portability (Windows, Linux, MacOS 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 ever with 20-year history and thousands of customers!
• No time nor file limits after one-time purchase
• 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 has special support of PDF forms.

How To Remove Password Protection From Pdf

PDF Password Remover Software helps to read and print password or encrypted PDF files. They remove the existing password easily and enable to open the PDF file. They can remove user as well as owner passwords and allow adding new password.

They can perform password removing process for multiple files in batch mode also. To know more about these PDF password remover software one can search Google using “pdf password remover software free. download full version”, “pdf password remover software freeware”, “pdf password remover software free” or “pdf password remover software download”.

A-PDF Password Security

This software helps to remove or change the existing password from PDF files. It can perform the task for a batch of PDF files too. It can also encrypt or decrypt PDF files. It helps change PDF metadata like title, subject also. It allows adding or removing expiry date and time too.

PDFCrack

This open source command line driven software helps to recover passwords and content from PDF files easily. It can crack owner and user passwords. It supports brute forcing and word lists the password. It comes with benchmarking facilities and can perform search for owner password when user password is available.

GuaPDF

This software easily removes existing passwords from PDF files. It supports encrypting, adding Unicode passwords and metadata for PDF files. It is a command line utility and works in batch mode too. It performs removing password for PDF file instantly. It allows editing or copying unlocked files through PDF viewer.

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Other PDF Password Remover Software for Different Platforms

There is a numerous of PDF password remover software available for different platforms. Since these sync software depends on the platform that they are using one should confirm for compatibility. For example, there are PDF password remover software that are explicitly meant for windows, android and Mac Os, etc. platforms.

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Free Windows PDF Password Remover Software – Instant PDF Password Remover

This excellent software can remove password from a PDF file instantly. It can remove passwords from encrypted or protected files also. It comes with drag and drop facility for selecting files. It comes with stunning user interface and the software is easy-to-use. It can remove both user and owner passwords.

Free Android PDF Password Remover Software – PDF Tools

It can perform several functions including adding and removing passwords for PDF files easily. It can also merge, split, extract, delete or rotate pages of PDF files. It can remove the existing password and allows adding new password even in encrypted PDF files and allows performing operations for multiple files.

Best PDF Password Remover Software For Mac Os – Coolmuster PDF Password Remover

This prominent software can remove password from PDF files for printing, editing and copying with ease. It can remove user password encryption by entering authorized password. It can remove passwords for multiple PDF files at one time through batch functionality. It comes with drag and drop facility to perform operations.

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More Great PDF Password Remover Software for Windows, Mac and Android Platforms

For windows version some of the PDF password remover software is “VeryPDF PDF Password Remover”, “Weeny Free PDF”, “Password Remover”, “Aplus PDF Password Remover”, “Easy Do Pdf Password Recovery” and “Easy PDF Unlocker”. For Android application some of the PDF password remover software is “PDF Utility” For Mac Os version some of PDF password remover software is “PDF Password Remover” and “iStonsoft PDF Password Remover”.

Most Popular PDF Password Remover Software For 2016 – Free PDF Password Remover

This easy-to-use software can remove user and owner passwords easily. It allows to work from explorer or through drag and drop facility. It can perform batch file processing to unlock files and supports many languages too. It does not require Abode Acrobat software installed and supports all versions of PDF files.

What is PDF Password Remover Software?

PDF password remover software is a tool to remove existing password which enable to open the PDF file to perform editing, copying or printing operations. The PDF files are set with passwords to protect from misusing when they are transmitted through emails or USB drives.

However if one forgets password it is impossible to open them again and these software help to overcome this difficulty by removing the password quite easily. To understand more about these software one can search Google using “pdf password breaker”, “pdf password recovery”, “pdf password remover software online” or “pdf password remover software with serial key”.

How to Install PDF Password Remover Software?

PDF password remover software installation files come with installation instructions and one can check the installation instructions and complete the installation process quite easily. One can visit the vendor website and go through the procedure for installation or get the help of the customer care and install the software without any hitches.

Benefits of PDF Password Remover Software

There may be situations when one set a password to protect the PDF file from accessing by unauthorized persons and forget the password. Under these circumstances these tools help to access the PDF files and work on them. They come with many features like removing passwords for multiple files in one stroke and support for multi-language.

They also repair damaged PDF files without altering the contents of the original file. They come with drag and drop facility such that one can easily remove password for more than one file at one time easily. Some of these software enable opening PDF files without Abode Acrobat software too.