How to Unzip Password Protected Zip File If Forgot Password

If you set a password whiling zipping a file but now forgot the password, then how can you

unzip the password protected zip file without the password? Regarding this, I will show

you how to retrieve or bypass the forgotten zip password, either of which requires you to

use a third party utility, so that you can successfully unzip the password protected zip file.

Option 1: Retrieve forgotten zip password with ZIP Password Refixer

Option 2: Bypass forgotten zip password with NSIS

Option 1: Retrieve forgotten ZIP password with ZIP Password Refixer

ZIP Password Refixer is a powerful ZIP password recovery utility. It can help you retrieve

a forgotten/lost ZIP password so that you can unzip your password protected ZIP file.

Steps are as follows.

Step 1: Install and run iSumsoft ZIP Password Refixer.

Get iSumsoft ZIP Password Refixer software from iSumsoft official site, and install it on

your computer. After installation, launch it.

Step 2：Add zip file path to ZIP Password Refixer.

Click on the Start button, navigate to the path to the password protected zip file you want

to unzip, select it, and click Open to add the zip file path into the software.

Step 3: Set password attack type.

A right attack type will help the software perform a high performance and retrieve a

forgotten zip password in the shortest time. There are four attack types you can choose

from. By default, ZIP Password Refixer selects brute-force attack and check all uppercase

and lowercase letters options, and all digits options. You can change that based on your

case.

Step 4: Start zip password recovery.

Click on the Start button. ZIP Password Refixer will immediately start working and ZIP

password can be recovered and displayed soon. Then you can use the password to unzip

the password protected zip file.

Option 2: Unzip password protected zip file with NSIS

NSIS can convert a zip file to a self-extracting archive (a NSIS installer) file. Install the

NSIS installer, and then the password protected zip file will bypass the forgotten password

and automatically unzip. Steps are as follows.

Step 1: Get NSIS free, and install it on your computer. After installation, launch it.

Step 2: Click on Installer based on ZIP file.

Step 3: After the Zip2Exe dialog opens, click the Open button, navigate to the path to the

password protected zip file you want to unzip, select it, and click Open to add the zip file

path. Then locate the Output EXE File section and use the Browse button to select one

location to save an .exe file. Finally click on the Generate button in the lower right corner.

Step 4: Click Close. And you will see the password protected zip file is converted to a

NSIS installer (.exe) file on the location you just specified in step 3.

Step 5: Right click on the NSIS installer file and select Run as administrator to run it with

admin rights.

Step 6: Follow the Setup to install it. Once installation is complete, the password

protected zip file automatically unzips without password required.

Tips: Generally, the NSIS program can successfully unzip a password protected (or

unprotected) zip file. However, there are some cases in which some of the contents in the

zip file get lost after unzipping with NSIS. If so, you still have to use a ZIP password

recovery tool like iSumsoft ZIP Password Refixer to unzip a password protected zip file

if the password is forgotten.