JSONToTable

JSON to Swift Converter

Convert JSON data to Swift structs with Codable support for iOS development

JSON Input

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Swift Output

Swift code will appear here

Paste JSON in the input area to get started

How to Convert JSON to Swift Structs - Step by Step Guide

Step 1

Input Your JSON Data

Start by adding your JSON data that needs to be converted to Swift structs. The tool analyzes the structure to generate appropriate structs with Codable protocol support.

Example: Try This JSON Data

Copy and paste this JSON example to see how it works: 🍎

{
  "userId": 12345,
  "username": "iosdev",
  "email": "dev@apple.com",
  "isActive": true,
  "preferences": [
    "dark_mode",
    "push_notifications",
    "face_id"
  ],
  "profile": {
    "firstName": "iOS",
    "lastName": "Developer",
    "age": 25,
    "country": "USA"
  }
}
Step 2

Configure Swift Options

Customize how your JSON is converted to Swift structs! ⚙️ Choose Codable protocol and optional types.

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Codable protocol: Generate Codable conformance for automatic JSON encoding/decoding
•
CodingKeys: Handle JSON field name mapping with custom CodingKeys enum
•
Nested structs: Handle complex JSON hierarchies with nested Swift structs
•
Type mapping: Automatic Swift type mapping from JSON data types
Step 3

Get Generated Swift Code

Watch the transformation! ✨ Your JSON structure becomes clean, typed Swift structs ready for iOS development.

Swift Code Output

Your JSON becomes these Swift structs:

import Foundation

struct Profile: Codable {
    let firstName: String
    let lastName: String
    let age: Int
    let country: String
}

struct Root: Codable {
    let userId: Int
    let username: String
    let email: String
    let isActive: Bool
    let preferences: [String]
    let profile: Profile

    enum CodingKeys: String, CodingKey {
        case userId, username, email, isActive, preferences, profile
    }
}
Step 4

Copy or Download Swift Code

Perfect! Now you can use your Swift structs in your iOS applications for JSON processing. 🚀

•
Copy to clipboard for immediate use in your iOS projects
•
Download .swift files for integration into your Xcode project
•
Use with frameworks like SwiftUI and UIKit
•
iOS applications and mobile development

What is JSON to Swift Conversion? 🍎

JSON to Swift conversion transforms JSON data structures into Swift structs with Codable protocol for seamless data binding in iOS applications. This process analyzes JSON structure and generates Swift structs that can encode and decode JSON data, making it easy to work with APIs in iOS development.

Frequently Asked Questions

What Swift features are generated for JSON handling?

The tool generates Swift structs with Codable protocol conformance, CodingKeys enums for field mapping, proper property types, and automatic JSON encoding/decoding capabilities for seamless API integration.

Can I use the generated structs with iOS and SwiftUI?

Absolutely! The generated Swift structs work perfectly with iOS, SwiftUI, macOS, and other Apple frameworks. They integrate seamlessly with URLSession, Combine, SwiftUI data binding, and @ObservableObject patterns.

How are nested JSON objects handled in Swift?

Nested JSON objects become separate Swift structs with proper relationships. The tool creates a struct hierarchy that mirrors your JSON structure, with parent structs containing properties of child struct types.

What Swift data types are used for JSON values?

JSON strings become Swift String, numbers become Int/Double, booleans become Bool, arrays become [Type], and objects become custom structs. The tool intelligently maps JSON types to appropriate Swift types.

Do the generated structs work with URLSession and networking?

Yes! The Codable conformance makes them perfect for URLSession, Alamofire, and other networking libraries. You can directly decode JSON responses into these structs using JSONDecoder.

Is the JSON to Swift converter free to use?

Yes, completely free with no limitations on JSON complexity, struct generation, or usage frequency. No registration required, and you can generate unlimited Swift structs from JSON data at no cost.