Community Packages
Flipper
For projects that use Flipper, there is a Flipper plugin called Advanced Async Storage. The plugin provides basic CRUD operations on Async Storage.
Non Flipper
For the projects which aren't using Flipper, you can use the React Native Debugger which comes with a built-in Async Storage support. The debugger allows to print the Async Storage content to the console, and clear it completely.