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How to Unzip a Password Protected ZIP Archive File

Have a ZIP file that you cannot extract or view its contents because you don't know what password it is? If you forgot the password, the only option you have to try is to recover the password using third-party utilities. In this post, you will learn how to unzip a password protected zip archive file.

2 options to unpack password protected archive file

Option 1: Unzip archive file with password you know

If a file in the Zip file is already encrypted, it will ask for a password when you try to extract this archive file. Use these steps to extract files or folders.

Step 1: Locate the zipped folder that you want to extract files or folders from.

Step 2: To unzip all the contents of the zipped folder, right-click the folder, select Extract All.

Extract an encrypted zip file

Step 3: When it prompting for the password, enter password you know.

Enter password for encryptedfile

Lean more details, see how to zip and unzip files in Windows 10 without WinZip software.

Option 2: Find the original password using Zip Password Refixer

What if you have an password protected Zip file but don't know the password to extract it, how to do? Luckily, there are a bunch of zip file password recovery tools can help you find the original password to unzip the encrypted archives. The best choice is to use the most powerful Zip password-cracking program --- iSumsoft ZIP Password Refixer. These steps below will show you how to use it.

Step 1: Download and install Zip Password recovery tool to your computer.

Click this link, it will allow you to download iSumsoft ZIP Password Refixer.

Step 2: Add the password protected zip to the software.

Run the program, and then click Open to import your locked archive file.

Open the locked ZIP file

Step 3: Select Appropriate password recovery mode and specific relevant settings, such as the length, the range and the upper case, lower case or special character mentions of your password.

1. Brute-force Attack

When you have no clue what the password may be, choose Brute-force attack. It will try every possible key combination until the correct password is found. Due to the number of possible combinations of letters, numbers, and symbols, a brute force attack can take a long time to complete.

Select password recovery mode

2. Mask Attack

If you remember something about the password, say the length of the password, you can choose Mask attack. The settings of this attack include password Length, Character Range and Affix. Set these items can help you find lost password more quickly. For example, if you still can remember that your password consists of three digits and ends with "1", then you can check "All digits (0-9)" option and set the Mask to "??1" ("?" stands for the part you forgot.)

Mask Attack

3. Dictionary Attack

If the zip password is one of your frequently used password and you are not sure which it is, choose Dictionary Attack. It attempts to determine a password by trying words from a predefined list, or dictionary, of likely passwords. You can set a text file with all possible passwords and import this text file to the program.

Along with this text file, there will be a default dictionary, both of which are for the reference of the program.
Learn more about password recovery with Mask and Dictionary attack.

Step 4: Start recovering password.

Simply click on the Start button to start the task. The process will take some time to complete.

Recover ZIP password

Step 5: Once the program get your original password, it'll prompts you with a window with password there. Then you can easily unzip protected files with that password. Just enter password into the required box. So that you can open file that you want.

Enter password to unzip archive file