Windows: Get saved WiFi Passwords
To get a list of currently saved profiles run:
netsh wlan show profile
After noting the profiles name use the following to show all the information including the passphrase in plain-text:
netsh wlan show profile <profileName> key=clear
If you have the WSL enabled you may also use the following command to quickly extract the SSID and passphrase:
netsh.exe wlan show profile <profileName> key=clear | ack "(SSID name\s*:|Key Content\s*:)"