Check the WiFi router label for the default password
Look in your device’s saved WiFi settings
On Windows, open Network and Internet settings, then view the saved WiFi network password
On Mac, open Keychain Access and search for the WiFi network name
On iPhone, check saved WiFi passwords in Settings if your iOS version supports it
On Android, open WiFi settings and view the saved network QR code or password if available
Log in to your router’s admin page and view or change the WiFi password
Reset the router if you cannot recover the password
Contact your internet service provider if the router was supplied by them