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SwiftyJSON

A Swift library that makes reading JSON data simpler and safer than Foundation's built-in parsing.

GitHub Download 5.0.2
Stars
22.9k
Forks
3.4k
Licence
MIT
Language
Swift
Last update
3 months ago
Type
Library

What it is

SwiftyJSON is a Swift library for working with JSON data, the common text format apps use to exchange information with servers. Instead of writing nested type casts to pull out a value, you can write short paths like json[0]["user"]["name"] and get an optional or a default value back. The README says this avoids crashes from missing keys or wrong types, because errors are stored on the result rather than thrown.

  • Reading a username or other field from a JSON response returned by a web API
  • Looping over a JSON array or dictionary received from a server
  • Building a JSON object in code and serializing it through the library's setter syntax

Great for

  • Swift developers building iOS, macOS, tvOS or watchOS apps that read JSON from web APIs
  • Teams maintaining existing projects that already use SwiftyJSON
  • Developers who want quick access to nested JSON without writing many optional casts

Not ideal for

  • Projects that need strongly typed models; the README's approach is dynamic lookup, and Swift's Codable is not discussed in the README excerpt
  • Non-Swift projects, since this is a Swift library
  • Projects on platform versions or Swift toolchains below those listed in the Requirements section
Step-by-step guide: how to use SwiftyJSONInstall, first run, examples, tips and FAQs
SwiftyJSON alternativesJSON for Modern C++ vs SwiftyJSONAlamofire vs SwiftyJSONGJSON vs SwiftyJSON

How to get it

  1. 1

    Install with a package manager

    You'll need: Xcode 16+ · Swift 6.0+

    Add to Package.swift (Swift Package Manager)

    https://github.com/SwiftyJSON/SwiftyJSON.git

    Install with CocoaPods (Podfile entry)

    pod 'SwiftyJSON', '~> 4.0'
  2. 2

    Run it

    • Add the SwiftyJSON package or pod to your project using one of the README's integration methods
    • Add import SwiftyJSON at the top of a Swift file
    • Create a JSON object with try? JSON(data: dataFromNetworking)
    • Read a value with .string, .stringValue or .arrayValue
  3. 3

    Get the most out of it

    • Use the path-style subscript, such as json[1, "list", 2, "name"], to reach nested values in one line
    • Use the optional getters (.string, .number, .bool, .int) when you need to detect missing values, and read .error for the reason
    • Use the non-optional getters (.stringValue, .intValue, .arrayValue) when a default is acceptable
    • Check the Error section for the SwiftyJSONError cases if you need to handle failures explicitly

Downloads

Source code (.zip)master branch · straight from GitHubRelease 5.0.2Release notes and source

Strengths

  • Short, readable syntax for nested JSON access compared with the README's JSONSerialization examples
  • Missing keys or wrong types return an error value instead of crashing, according to the README
  • Supports common installation routes: CocoaPods, Carthage and Swift Package Manager

Trade-offs

  • Dynamic lookups move type checking to runtime, so typos in keys are caught later than with typed models
  • The README excerpt is truncated, so details of the newer 5.x API are not fully visible here
  • Latest release shown is 5.0.2 with no binaries, so you install it through a package manager or source

How it compares

ProjectStarsTypeLevelUpdatedBest for
SwiftyJSON (this)22.9kLibrarybeginner3 months agoSwift developers building iOS, macOS, tvOS or watchOS apps that read JSON from web APIs
Alamofire42.4kLibraryintermediate5 days agoSwift developers building iOS or macOS apps that call web APIs
SwifterSwift15.3kLibrarybeginner4 days agoSwift developers building iOS or macOS apps who want common helper methods ready to use
SVProgressHUD12.4kLibrarybeginner8 months agoiOS developers who need a quick loading indicator for a blocking task
Eureka11.8kLibraryintermediate2.2 years agoiOS developers building form-heavy screens in Swift
FSCalendar10.6kLibraryintermediate2.2 years agoiOS developers who need a calendar or date-picker view in their app

Stats synced from GitHub. The assessment above was drafted with AI from the project's README on 2026-10-29 and may miss recent changes — check the README before relying on a command. MIT licence: free to use, modify and distribute, including commercially, as long as you keep the copyright notice.