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How to Open Password Protected ZIP File without Password

Have you encountered such a situation where you were asked for passwords to extract a zip file downloaded from internet, or you forgot the passwords for your encrypted zip file? So you are looking for one really effective way to open a password protected zip file without knowing the password? Now you are in the right place.

Without password, to open a password protected ZIP file, certainly you need some really effective ZIP password-cracking software. Now there are two such software you can choose from to open a password protected file. One is iSumsoft ZIP Password Refixer that can recover unknown password from encrypted ZIP archive file. Another is NSIS that can remove ZIP password.

How to open password protected zip file without password?


Method 1: Open password protected ZIP file by recovering password

iSumsoft ZIP Password Refixer is powerful ZIP password software that helps recover unknown password from encrypted ZIP archive file in the short possible time. Then you can open your password protected ZIP file with the recovered password.

Step 1: Recover unknown password from password protected zip file

1. Download and install ZIP Password Refixer on your computer. Then launch this program.
2. Click Open button. Browse for the password protected zip file and add it into this program.

Open password protected ZIP file

3. Selecting a proper password attack type and set relevant settings.

By default, the "Type of Attack" is set to Brute-force and the options that are checked include all capital and all lowercase letters. When you have no clue what the password may be, choose this attack, and there's no setting for this 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.

Learn more about password recovery with Mask and Dictionary attack.

select password attack type

4. Click Start button to start discovering the zip password.

When the zip password is found, this program will prompts you with password listed there.

Open zip file with recoveredpassword

5. Open password protected zip file with the password

Then you can easily open your password protected zip file with the password. To do:

1. Double-click the ZIP files you want to unzip.
2. Enter the password for your ZIP files when the password window appears. And click on OK to go on.
3. Choose Extract All Files from the folder sidebar. Choose a location for your files and click Next then Finish.

Enter password to open zip file

Tips: In order that you can open the password protected zip file without entering password later on, you are recommended to firstly extract the zip and then compress to a new zip by not setting password. So the zip file is not protected and you can directly open it without password.

Method 2: Open password protected ZIP file with NSIS

NSIS is magic software that can convert a password protected ZIP file into an exe file. Install the .exe file so that it can turn into your ZIP file and you can open it without password.

Step 1: Download NSIS and install it on your computer. Then run it.

Step 2: Click the Installer based on ZIP file.

Click the Installer based on ZIP file

Step 3: Click the Open button. Navigate to the path to your password protected ZIP file and add it to NSIS software.

Click Open

Step 4: Click the Browse button and select one path to locate the EXE file it will generate. And then click the Generate button.

Select Output path

Step 5: When the generation is complete, close the dialog and you can see an EXE file just like the one below.

EXE file

Step 6: Double click the EXE file to install it. When the installation is complete, it extracts your password protected ZIP file. And you can open it without password.