Android doesn’t allow you to view saved passwords natively, but if you’re a rooted user, a simple and effective app will get around this issue in a few simple taps. The app is called WiFi Key Recovery.
When you first launch WiFi Key Recovery, the app will ask for Superuser access. Tap “Grant” on the popup, then you’ll be taken to a list containing all of the Wi-Fi networks that you’ve ever connected to, where each entry shows a password in the “psk” field.
If you’ve connected to many different Wi-Fi networks over the course of owning your Android device, your list may be quite long. If that’s the case, you can search for a particular Wi-Fi network by using the “SSID Quicksearch” field.