Open Settings on your iPhone, iPad, or iPod touch
Tap your name
Tap Sign-In & Security
Tap Change Password
Enter your device passcode
Enter a new password
Confirm the new password
Tap Change
On a Mac, open System Settings
Click your name
Click Sign-In & Security
Click Change Password
Enter your Mac password
Enter a new password
Confirm the new password
Click Change
On the web, go to iforgot.apple.com
Enter your Apple ID
Follow the on-screen steps to verify your identity
Create a new password
Confirm the new password