normalizr

Many APIs, public or not, return JSON data that has deeply nested objects. Using data in this kind of structure is often very difficult for JavaScript applications, especially those using Flux or Redux. Normalizr is a small, but powerful utility for taking JSON with a schema definition and returning nested entities with their IDs, gathered in dictionaries. Normalizr is built for various environments. Normalizr was originally created by Dan Abramov. Since v3, it was completely rewritten and maintained by Paul Armstrong. It has also received much help, enthusiasm, and contributions from community members.