Using JSON

Most mobile and web apps use JSON for tasks such asexchanging data with a web server.This page discusses Dart support for JSON serialization and deserialization:converting Dart objects to and from JSON.

Libraries

The following libraries and packages are useful across Dart platforms:

• dart:convertConverters for both JSON and UTF-8(the character encoding that JSON requires).

• package:json_serializableAn easy-to-use code generation package.When you add some metadata annotationsand use the builder provided by this package,the Dart build system generates serialization and deserialization code for you.

• package:built_valueA powerful, opinionated alternative to json_serializable.

Flutter resources

• JSON and serialization
• Shows how Flutter apps can serialize and deserialize bothwith dart:convert and with json_serializable.

Web app resources

• AngularDart Tutorial, part 6: HTTP
• Illustrates how a Dart web app can interact with aRESTful backend using JSON data.
• Using HTTP resources with HttpRequest
• Demonstrates how to use HttpRequest to exchange data with a web server.Part of the dart:html library tour.

VM resources

• Write HTTP Clients & Servers
• Walks through how to implement command-line clients and serversthat exchange JSON data.