How to remove protection from PDF
Educational Program Technologies / / December 19, 2019
PDF files can be protected in several ways: DRM (Digital Restrictions Management), user password or copyright. In addition, PDF may be a set of images with text.
Layfhaker hopes that you will use these techniques only to good use and become able to access information that is not yours.
How to reset the user password
The user password is requested when attempting to open a protected document. Without it, any action with the file. Reset or bypass it difficult.
You can try to guess the password dictionary using the proposed tools, but this method does not guarantee the result. Especially if it is a very complex passwords. In addition, you need a lot of time and quite a powerful computer with Windows or MacOS.
On smartphones with Android or iOS to remove such protection will not work.
Passcovery Suite
This application for Windows allows you to recover passwords to many document formats and files, including PDF. It can use the resources of your discrete graphics card, so that the selection of passwords is carried out with a decent speed. However, only the first two characters of the found password are displayed in the free evaluation version, and the selection of the time limited to 30 minutes.
Passcovery Suite easily snapped PDF with password 1111, but overawed by the seemingly simple lifehacker1. So before you buy, make sure that the application can pick up your password. It costs $ 199.
Passcovery Suite for Windows →
Cisdem PDF Password Remover 3
Another application that is able to crack a user password PDF simple search options. Differs from the previous one that works with MacOS. The rest of the applications are similar because the same method is used.
Drag and drop the PDF into your window, click the lock icon, and then click Forgot option. Specify the number of characters and possible special characters in the password, if you know, and click Decrypt.
Cisdem can easily cope with numeric passwords such as 111 and 112121, but more complex utility, apparently not too tough: they can crack it for a few days, does not guarantee the result. Perhaps the application and can help you, but keep in mind: sorting of passwords is very time consuming. So make the best that the computer does not fall asleep without you, and do something useful.
Free trial version unlocks only the first five pages of the file. The license will cost you 34.99 dollars.
Cisdem PDF Password Remover 3 for MacOS →
How to reset your password author
This password is the creator of a document to protect the copyright. You can view the PDF, but you do not get to edit, print, or copy its contents: every time you try to do something with the PDF will be prompted for your password. However, such protection is much easier to remove than the previous one.
Google Chrome + «Google Documents"
This is the simplest way to print or copy text from protected PDF.
Start Google Chrome. Go to the «Google Documents" and open the "file selection window" (the folder icon to the right). Select the tab "Download" and fill in the «Google Drive" your PDF. When it opens, print a file (click on the printer icon), or save the contents of an editable PDF (click on "Change" and select "Save as PDF»).
From the new document, you can copy the content without problems. In addition, it can be edited using Adobe Acrobat or other PDF editors and print.
Online Services
Password reset the author know how many online services. One of them - Smallpdf.com. Go to the site, drag the PDF to download to field, confirm that you have the right to remove protection from PDF (service believe your word), and then click on the "Unlock". The resulting PDF can be saved on the hard disk in your Dropbox or «Google Drive" either immediately start editing in «Google Docs."
Smallpdf.com →
If Smallpdf.com for some reason is not available, you can use PDF.io, Unlock-PDF.com, iLovePDF and other online services. they all work exactly the same way.
How to copy text from scanned PDF
Some PDF-files are not password protected, but they still can not be copy or edit the text, because the pages are images. Typically, these programs are PDF, scanners, or manually from the photographed pages. Remove them from the text, you can use the applications or services for OCR.
FineReader and analogues
If you have ABBYY FineReader, then to extract text from PDF have no problems. Feed the PDF application and wait for the end detection. Then the text can be copied or saved as TXT or DOCX format.
Those who do not want to spend money on licensed FineReader, can try it online scanner. However, it will require registration and the free version able to recognize only 10 pages.
FineReader Online →
However, it has free alternatives.
How to remove DRM protection
Some PDF-books bought in digital libraries can not be read on the reader or tablet, because they have sewn the protection of Digital Restrictions Management. It is assumed that you will open them in a program Adobe Digital Editions, using a valid user ID to confirm their rights for reading.
All DRM Removal
This application is for the Windows, MacOS and Linux helps to remove the PDF DRM-protection and, therefore, open, copy and edit the file as you like. Note that this is infringing.
All DRM Removal can be tested for free, but then have to pay 19.99 dollars.
All DRM Removal →
see also
- Do without Adobe: how to save on operating instruments →
- 22 little-known function «Google Docs," which will make the job easier and more convenient →
- How to read 100 books a year →