iSumsoft » Resources»PDF»How to Open Password Protected PDF File for Reading without Password

How to Open Password Protected PDF File for Reading without Password

If you are asked for a user password (also known as a document open password) while opening a PDF file but you don’t know (or remember) the password, how can you open the password protected PDF file for reading?

Now this page will show you the tricks of how to open password protected PDF file for reading without password.

Option 1: Open password protected PDF file for reading with owner password

When a PDF file is protected with both a user password and an owner password, it can be opened with either password. Hence, if you forgot the user password but still remember the owner password, you can use the owner password to open the password protected PDF file for reading as well as editing, printing, etc. If you know neither of the passwords, or if the PDF file is protected only with an unknown user password, see the second option below.

Option 2: Open password protected PDF file for reading with third-party software

When you don’t know (or remember) the PDF use password, you have to break the password with the help of third-party software, so that you can open the password protected PDF file for reading.

Almost all third-party PDF password recovery software use brute-force attack technology to walk through all possible passwords one by one until the password is found. The workload is huge. Hence, besides computer performance, the software’s speed and efficiency are very important. Here we recommend you PDF Password Refixer, one of the most powerful and efficient PDF password recovery tools that can break PDF user password without losing data in the shortest time.

Step 1: Install PDF Password Refixer on your computer. After installation, launch it.

Step 2: Add the password protected PDF file path to the software, by clicking the Open button or File -> Open File option on the menu bar.

Add PDF file path

Step 3: Select one attack type and choose password properties, such as the ranges of characters, password length, etc.

Tips: Dictionary and Mask attack are intended for users who forgot the password but kind of vaguely remember it partially.

Choose attack type

Step 4: Click Start to start discovering PDF password.

Step 5: When the password is recovered and displayed, click Copy followed by Open.

Click Copy and Open

Step 6: Your Adobe product (Adobe Acrobat or Adobe Reader depending on which program you use as default program to open PDF file) will start. Paste the password into the box, and then click OK. You will successfully open the password protected PDF file for reading.

Paste the password