In this guide, I will show you how to unlock a secured pdf. Keep reading!
Nowadays people prefer to send essential documents mostly in Pdf or word document format. Often some sensitive or top security contents are also transmitted from one device to another or even over the internet. There is always a risk of leaking essential data to some malicious user. Therefore, those PDF files are made password protected. So, this article will give detail information about how to unlock a secured pdf file so that you can use the file after removing the password.
How to Remove Password from a pdf file
There are various ways of removing a password to unlock PDF files, but in this article, we will discuss the three most straightforward methods that can be easily performed by any user.
1. Unlock a secured PDF: Using PDF password Refixer
To unlock PDF files, you need to carry out the following steps exactly the way it will be mentioned.
Step 1. First and foremost you have to download a PDF password remover software named as PDF password Refixer from www.isumsoft.com. Isumsoft password Refixer is one of the most useful PDF password remover software and hence helps you to unlock PDF files.
Step 2. After downloading and installing, you will have to open the software. It has an interface as mentioned here:
Step 3. Click on the ‘Open’ menu and select the desired PDF file which is password protected (Refer to the picture).
Step 4. After selecting the desired file, you will have to choose the path of the document and add the path to the software. (As the path highlighted in the next pic).
Step 5. Then after confirming about the path, you will have to select the password attack type and also select the relevant option such as proper Range and Length of the password. (Refer to next pic to get an idea of attack type and for selection of appropriate length and range).
Note: This software can initiate four types of attacks on the password to obtain the actual password. So the four types of attacks are discussed below:
Brute Force is the most straightforward attacking process to extract the password of the encrypted PDF file. By this process, the software tries to retrieve the password by working on every character combination one by one. This type takes a lot of time if a long password is applied.
For example, for a one letter password it checks all the 26 characters, and for two letters it calculates 26*26=676 combinations.
Mask attack is a useful attacking process if you remember a part of the password. This attack is slightly better than brute attack as it takes less time to track down the password.
For example, if you know the last two letters of a password then you can use this instead of Brute force as the latter would take much more time than Mask attack.
Through dictionary attack, the software matches the entire expected password with the words in the dictionary. So the chances of password extraction are very high as most of the people choose words from the dictionary.
It is the most advanced and almost similar to brute force but it takes much less time to extract the original password as it does not consider meaningless combinations.
So through these four attack types, PDF password Refixer software initiates the PDF password removal technique and eventually generates the original password.
Step 1. After selecting the desired length and range click on “Start” to allow this PDF password remover to work on the file and eventually this software will display the actual password. (Refer to these pictures where the real password is revealed).
Step 2. In this result, you can see that the actual password extracted by this PDF password remover software. Here in this example, the actual password is “an” which is correctly tracked down by this software.
Step 3. While trying to unlock PDF file without any password, you will get a message which will tell you to enter the correct password to get access into the locked PDF file.
Step 4. As you will enter the correct password obtained from the PDF password remover software you will notice that the encrypted PDF will open.
2. Unlock a secured PDF: Using smallpdf tool
This method is more straightforward than the previous method as you can perform this method without any software. To execute this method, you only require your internet connection.
Follow the steps as mentioned below to unlock PDF file that is encrypted by a password
Step 1. At first, you have to go the www.smallpdf.com site and select the “unlock PDF” option at the bottom right corner of the screen.
Step 2. After selecting “unlock PDF” option, you will go to the main page where you have to upload the password protected PDF file.
Step 3. In the next step, you have to upload the password protected file into the www.smallpdf.com site so that the website can offer you the unlocked PDF file that you can download.
Step 4. But before downloading the unlocked PDF file, you will have to check the box that is marked in the picture.
Step 5. After checking the box, you will be able to download the unlocked PDF file directly to the computer.
Step 6. The downloading process is shown in the next picture.
Step 7. After downloading the unlocked PDF file directly into the computer system, you will be able to open the file without any password. Therefore this PDF password removal process is straightforward to execute and can be performed without any software. The file that is downloaded from www.smallpdf.com is not password protected, and so you can easily open it with a single click.
Here is your password protected file which is now opened
So, the most straightforward PDF password removal techniques are discussed above. We can assure the user that if they go through this article properly, they will be able to remove any password combination as this article is a complete guide to teach everyone how to remove password from a PDF file to unlock PDF with the help of the most straightforward PDF password removal techniques.