First identify the password
A saved Wi-Fi key joins the network. A router admin password opens the control panel. They may be different; use admin-password recovery for the second case.
Windows
Open the saved network properties and use the security-key view when your Windows version offers it. Administrator approval may be required.
macOS
Open saved network details or Keychain Access, select the network and authenticate when macOS asks.
Android
Open connected Wi-Fi details and use Share or QR when available. Manufacturer menus differ; do not upload the QR.
iPhone and iPad
On supported versions, open saved network details and authenticate to reveal or share. Otherwise use built-in sharing or ask the owner.
If unavailable
Check the label, ask the owner, or use router settings after finding the gateway. Do not crack passwords or reset unnecessarily.
Frequently asked questions
Can I find a password for a network I do not own?
Only use these steps on a device and network you own or are authorised to use.
Is a QR code safe to share?
It is a bearer credential; anyone with the image may join.
Will a reset help?
It may erase settings and is not a first step.