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Hack protected pdf. How to remove protection from a PDF file? How copy protection of PDF files works

We live in the information age, in an age where profit can be made from any information, thereby harming the original owner of the information. But sometimes you have to go against this and act as needed. Today we will consider the question of how remove protection from pdf file.

As you know, files of this kind are books, magazines, and other publications. Therefore, sometimes authors install protection to stop unauthorized access. The installed protection does not allow the user to print, copy, edit the contents of the file, which is where the need arises removing protection from a protected pdf file.

First, let's look at what types of protection are most often used on PDF. It is important to know about this because, having this information, you can quickly estimate how long it will take you to remove the installed protection.

Types of protection that are used onPDF:

  • prohibition on printing a document;
  • prohibition on editing the document;
  • prohibition on copying the contents of the document;
  • prohibition on extracting pages from a document;
  • prohibition on document layout;
  • setting a password to open a file (document);
  • setting a password for editing access rights to a document.

The thing is that not every protection can be easily and quickly removed (hacked). For example, if the author has set a password on his PDF document to open it, then decoding such a document will be quite problematic, and here it is impossible to do without the use of specialized programs. Moreover, very often this kind of software is not free, and the worst thing is that using it does not guarantee you a positive result, because such a science as encryption also does not stand still. In addition, most of these applications work on the principle of selecting a password by trying all possible combinations, which, as a rule, takes quite a lot of time, especially if the password set is of an impressive size and complexity.

But you shouldn’t worry about this, since password protection is used very rarely, for the reason that in order to put this kind of protection on pdf, you also need specialized programs, which, as a rule, are distributed on a paid basis.

Most often, regular protection is placed on pdf documents, that is, protection from printing or editing the document.

1. For help, let’s turn to the PDFpirate service, the owners of which have worked hard to create it. We go to this site and click on the “Remove restrictions” button. In the next window, the user needs to select the file that he wants to unlock. Using “Browse”, select the pdf file. This file will be automatically unlocked after consent. After a short time, the user receives an unprotected file on his computer, which he has the right to dispose of at his own discretion. Such a simple method will greatly save the nerve cells of users who were fairly strained by the existing protection on pdf file. The address of this service is http://pdfpirate.org. We must pay tribute to the creators, because they greatly simplify the life of ordinary pirate users. 2. PDF Unlock (http://www.pdfunlock.com) is also a convenient service for removing protection from PDF files. Everything is quite clear on the site and anyone can understand the process unlock pdf. Simply select the required file and click “Unlock!” After a few seconds, the output is a lukewarm file without protection. The service has some shortcomings, but the developers are actively working to eliminate them.3. The FreeMyPDF service (http://freemypdf.com) has also proven itself well. As in the two previous times, you just need to select the file and click “Do it”. Once again we get a file without protection at the output. But there is a drawback - the file size should not exceed 150 MB. Well, there are always “BUTs”.

After all the manipulations on the services, you should get the following:

Happy reading, pirates!

Let's start with the question: why are files blocked at all? Authors of pdf files do this to protect the copyright of their material. Thus, protect yours from copying, printing, editing, or making any unauthorized changes.

Many users have encountered the problem of being unable to read or print any PDF file. And sometimes it is very necessary. For example, you downloaded some electronic publication in PDF format and want to print it so that you can read the text from paper and not from a monitor. In this case, the file is protected from printing – “Print: Do not allow”.

Or another case - some book is distributed exclusively with a password, and you want to read it. But this is impossible due to the fact that this document is prohibited from reading. Unlocking can help in both of these cases, but not always. If you set a good administrator password and a password for opening pdf, then most likely nothing will work.

Many people do not like to install programs on their computer unless absolutely necessary; they prefer to use online services. Let's look at several online services designed specifically to unlock PDF. Let's briefly look at 3 such services.

1) http://www.pdfunlock.com

A very interesting service with simple functionality. Your task is to select the required file using the “My Computer” button (number 1 in Fig. 1). And then press the “Unlock!” button (in Russian “Open”, number 2 in Fig. 1). The unlocking time will depend on the file size.

Rice. 1 Unlocking a pdf file using the online service pdfunlock.com

The main drawback of this service is that some e-books cannot be unlocked.

2) http://freemypdf.com

Also quite a popular service for unlocking PDF. First, select the file (number 1 in Fig. 2), and then click on the “Do it!” button. (number 2 in Fig. 1). After some time, it will be possible to download the unlocked version of the file, if, of course, it is unlocked.
Rice. 2 Online service freemypdf.com

A distinctive feature of this service is the ability to upload only files not exceeding 250 MB. Another feature is that the service will not unlock a password-protected PDF file. In cases where there is a password, you are asked to follow the PDFCrack link to download the corresponding program. The link leads to the page http://pdfcrack.sourceforge.net/

3) http://smallpdf.com/ru/unlock-pdf

This online service differs from the other two above in that it has Russian language. On the main page of the service you can read:

Find the password-protected PDF and download it. If a file does not have strong encryption, its protection will be removed in a matter of seconds and it will be possible to download it. If the file is strongly encrypted, it can only be opened by entering the correct password.


Rice. 3 Online service smallpdf.com in Russian for unlocking PDF

You can upload a pdf file from your computer by clicking on the “Select file” button (number 1 in Fig. 3). If everything goes well, the “You can save the file” button will appear, which will allow you to receive the unlocked file on your computer.

P.S. Other useful online services.

A modern computer user often encounters problems when working with documents in pdf format. Such files are popular due to their functionality and convenience. But there are often situations when such documents have a certain type of protection, which causes some difficulties. After all, it is not always possible to copy information from such a file, and sometimes the document cannot even be printed.

There is no point in looking for the cause of such a situation, but it will not be possible to perform the desired action with a protected document until the restrictions are lifted. It is simply necessary to hack such documents. How to remove protection from pdf discussed in detail below.

It is important to know how to remove such protection. Today there are several ways to help make such a document available for use. As already noted, there are several convenient options. Some choose online services, others download and install special programs to perform such actions.

What types of protection are there?

Creators of .pdf files can use the following types of them to protect your work:

  • copy protection;
  • the need for a password to access various shares;
  • prohibition of access to content;
  • print protection;
  • ban on any changes and much more.

As you can see, there are a lot of options for bans and restrictions, but all of them can be lifted with the right approach. Below we will consider the most popular and common ways to remove protection from a pdf file.

Using Google Chrome

To get the job done In a similar way, you should perform the following algorithm of actions:

After completing these steps, access to the document is completely open, and you can perform any actions with it. This method is most popular if the question arises of how to remove the password from pdf.

Adobe Acrobat

This unlocking option is available for documents if the password is known. But in this case, you need to use the professional full version of Pro Adobe Acrobat, the usual user version Acrobat Reader won't help.

Then you should enter the password, and the protection will be removed completely.

Special online services

There are a huge number of online services that help remove protection from pdf files. To remove pdf protection online you won’t need a lot of knowledge and skills if you follow a simple algorithm and recommendations on the selected site. It is quite difficult to consider the specifics of each person’s work, but to show how do such resources work?, actually using one example. Below we will discuss the algorithm for unlocking such a file using the PDFUnlock resource. However, it is worth remembering that unlocking with this particular resource can be performed for documents whose size is no more than 5 MB.

Application of special programs

Like web resources, there are a lot of programs for removing protection from .pdf files. Some of them are completely free, some only allow you to work for free the first time. Below we will consider two programs whose operation is similar in principle to similar ones: Ghostscript and GSView. Using these two as an example applications, you can understand how to remove protection in pdf.

When the program is finished, you can check the status of the received file and start working with it.

As you can see, if you encounter a .pdf file with similar restrictions, you should not despair. Knowing how to remove protection from a document using PDF, you should spend a little time and start working with the necessary information.

The PDF format is one of the most common formats for storing text information and pictures. Digital versions of books, magazines, newspapers, and notes are distributed in PDF format. On our website we have already talked about that, as well as that. This time we will talk about removing protection from a PDF file.

One of the features of the PDF format is the installation of security. Such protection can block copying, printing, or even reading a PDF document. Naturally, such strict restrictions create a lot of inconvenience for users who work with PDF files.

Fortunately, the protection of PDF files is not very reliable. At the moment, there are many tools and methods that allow you to get around it. Now we will tell you how to remove protection from a PDF document without damaging its content.

There is an excellent online service for removing protection from PDF documents -. This service is free and allows you to solve problems with protected PDF documents in just a couple of mouse clicks.

Using this service, you can remove passwords, as well as remove any restrictions from a PDF document. All you need to do is upload a PDF file using a special form on the main page of the service. After which, you will be offered to download back the already unlocked version of the PDF document. The only limitation of this service is that it should not exceed 5 megabytes.

If the limitations of the pdfunlock.com service do not allow you to use its services, then you will have to use special programs to remove protection from PDF. Unfortunately, most of these programs are paid, but you can use the limited TRIAL version.

VeryPDF PDF Password Remover () is a paid program for removing restrictions from PDF documents. At the time of writing, it costs $30. In TRIAL mode, the program can be launched only 50 times, and only part of the pages of the original document will be available in the unlocked PDF file.

Wondershare PDF Password Remover() - a paid program for removing protection from PDF documents. Currently costs $20. Supports PDF format versions from 1.0 to 1.7. In TRIAL mode, the program unlocks only the first 5 pages of the source document.

Instructions

Download a special program to your computer in order to . For example, go to the website http://ru.software-free-download.net/archives/1090 and download the A-Pdf Password Security program. This program allows you to extract a password from a pdf file quickly enough, regardless of the length of the password. It can also install protection on your PDF documents. For the pdf, click the "Free Download Now" link. Install the program on your computer and run it. Next, select the option you want to use. To set a password or protection, select the Single PDF Document Security command, to remove protection and password from the pdf file, select the Batch PDF Documents Security option, click the “Next” button.

Click the "Add" button and select a file from your computer to remove the password from the pdf, click the "Open" button. If you have multiple files that need to be unlocked, then select a folder using the Add dir button. Click the “Next” button, the window that opens will indicate what protection is applied to this file. Select the required option, for example, “Show password to open document” and click next. The password will be displayed in the next window.

Download and install the PDF Unlocker program, you can download it from the website http://www.pdfunlock.com/. Install the program on your computer, run it, select trial mode to unlock the pdf file. In the program window, in the Select pdf file option, click the Browse button and select the file you want to unlock. The program will display the protection levels for the given file. Next, select the folder in which you want to save the document resulting from the unlocking. To do this, in the Select Destination field, click Browse and select the path to the folder. After that, click the Unlock Pdf button, the unlocked file will be saved in the specified folder.

Sources:

  • how to remove protection from a pdf document

PDF formats are very easy to read. Information formatted in this form is perceived much better than on a bare sheet of text editor. Sometimes there is a problem with protecting such files from copying. This is a solvable problem.

Instructions

Download and install a special program on your personal computer to unlock the pdf file. A-PDFPasswordSecurity is considered the most popular and convenient. You can download it on the official website of the developers at www.a-pdf.com.

After the download is complete, install it on your personal computer. This program will not only allow you to quickly unlock a pdf file, but will also install its own protection on a document of this type, if you wish.

Launch the A-PDF Password Security application. Use it to open the file you want to unlock. To do this, click the “Open” button on the toolbar and select the desired file. If you need to unlock several files at once, you can select an entire directory. All files will be downloaded and ready to go. Next, select the function you want to apply.