Core Data Lab, a Full-Featured Core Data Viewer

Some additional information: Core Data is the Apple-provided framework to persist your object data when you're developing software on macOS, iOS and friends. It uses SQLite as its underlying database.

I don't have anything to do with the product mentioned. It's just that as an iOS developer, I found Core Data finicky in my past projects. Often I wanted to check whether my object data was correctly saved into the underlying database, or add initial data, or edit data to test some logic. This product seems to be focused on exactly that.