How to Handle a Lost Keystore Password in Android

How to handle a lost KeyStore password in Android?

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It's unfortunate, but when you lose your keystore, or the password to your keystore, your application is orphaned. The only thing you can do is resubmit your app to the market under a new key.

ALWAYS backup up your keystore and write the passwords down in a safe location.

Lost my keystore password and key password,. but have the pepk file and the jks file, need to update the app

If youre enrolled in App Signing by Google Play then you can just contact support and send them a new pepk or pem otherwise you will have to create a new app.

Lost keystore password, but let Google Manage Signing Key

Because you've enrolled in Play Signing (i.e. "Manage Signing Key by Google"), then you can contact Google Play developer support and ask them for instructions on how to reset the upload key for your app. This will consist of creating a new keystore and sending them the new certificate (after you have proved your identity).

You will then need to change your signing configuration in your Flutter project to reference the new keystore.

After that, you'll be able to keep uploading updates of your app to the Play Console and your users will keep receiving updates as before.

The keystore you lost is what Google calls "upload key": it's only used to verify that what is uploaded effectively comes from you. But Google has a hold of the app signing key which it uses to re-sign the APK that are served to users.

The full documentation around Play Signing can be found here: https://support.google.com/googleplay/android-developer/answer/7384423

I reset my Keystore password

If you forgot your password, there is no way to fix this. If your application is not published to the playstore, you are free to change the sign-in cert to a new one. Otherwise you will not be able to update your app at playstore, you have to unpublish your current app, change the package name and publish a new one with a different key and package. So always try keep a backup of your cert file and password.