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A very high performance Objective-C JSON library.

Official JSONKit repository


TouchJSON is an Objective-C based parser and generator for JSON encoded data. TouchJSON compiles for Mac OS X and iOS devices (currently iPhone, iPad and iPod Touch).

Official TouchJSON repository

JSON Framework

A strict JSON parser and generator for Objective-C. It adds categories to existing Objective-C objects for a super-simple interface. More flexible APIs are also provided for added control.

Official web site

Official source code page


Model layer base class that makes it easier to implement NSArchiver/JSON serialization and offers higher-order functions (map, filter, fold) for NSArray, NSDictionary, NSOrderedSet, and NSSet, plus weak notification center observers.

Note: Mixed MIT/BSD licensed code.

Official Mantle repository

Google APIs Client Library

Written by Google, this library is a flexible and efficient Objective-C framework for accessing JSON APIs. This is the recommended library for accessing JSON-based Google APIs for iOS and Mac OS X applications.

Official Google APIs Client Library repository


CRServerSwitchboard lets you easily make asynchronous, threadless HTTP calls to your server for JSON encoded data. You can specify which HTTP method to use and optionally pass request data, and the request and response data is automatically converted into JSON notation.

Official CRServerSwitchboard repository


Objective-C bindings for YAJL (Yet Another JSON Library) C library. Allows for stream parsing.

Official yajl-objc repository