NoSQL Workbench for Amazon DynamoDB is a client-side application that helps developers build scalable, high-performance data models and simplifies query development and testing. Starting today, you can connect to your DynamoDB local instance, the downloadable version of DynamoDB, directly from NoSQL Workbench. 

from Recent Announcements https://aws.amazon.com/about-aws/whats-new/2019/11/nosql-workbench-for-amazon-dynamodb-adds-support-for-dynamodb-local/