Show All Wi-Fi Passwords

To show all Wi-Fi passwords on a computer, do the following in a CMD window

Show All Wi-Fi Profiles

This will show all the profiles on the machine

netsh wlan show profile

Get Password For Profile

Now that you know the name of the Wi-Fi profile, get it's password. key=clear allows the CLI to show the password in plaintext

netsh wlan show profile name=profilename key=clear

Export All to a File

Use this to export all the things to a file

netsh wlan export profile folder=C:\wifi\ key=clear