It's not free. But, it works great for Keystore needs!

Are you trying to upload your .aab file to the Google Play Store for publication? You might see the error that says :
"Android App Bundle uses an upload certificate with a key that is too weak."

Good news. I discovered an amazing Android app that lets you create a new Keystore, and you can sign your own .aab file for uploading to the Play Store. :+1:

 The developer of the app provides a YouTube Playlist to tell you how to use it properly. 👍

It might cost you about $2. But, it is well worth it. :+1: