JSON handling in Elixir is commonly done using libraries like Poison or Jason, which provide functions for encoding and decoding JSON data efficiently.

Handling JSON in Elixir can be efficiently accomplished using third-party libraries like Poison and Jason. Both libraries offer functionality for encoding Elixir data structures into JSON format and decoding JSON strings back into Elixir data types. To use either library, you first need to add it as a dependency in your mix.exs file. For instance, with Jason, you would include it in your deps/0 function as {:jason, "~> 2.0"}. After fetching the dependencies, you can use the provided functions to encode and decode JSON. For example, to encode a map into a JSON string, you can use Jason.encode!(my_map), and to decode a JSON string back into a map, you can use Jason.decode!(json_string). Both libraries also offer options for customizing the encoding and decoding processes, allowing you to handle complex data structures and customize key formats. By leveraging these libraries, Elixir developers can seamlessly integrate JSON handling into their applications, facilitating data interchange with APIs and external services.