📖 What is this tool?
JSON to Swift Generator converts JSON objects into Swift structs conforming to the Codable protocol. Swift Codable structs can be decoded from JSON with just two lines of code — ideal for iOS and macOS development.
💡 Example
Input
{"id":1,"name":"Alice","active":true}
Output
struct Root: Codable {
let id: Int
let name: String
let active: Bool
}
🛠️ Common Use Cases
- Generate Swift structs from API responses
- Scaffold iOS data models from JSON
- Create Codable types for URLSession
- Convert API documentation to Swift models
- Bootstrap Swift projects with data types
❓ Frequently Asked Questions
What is the Swift Codable protocol? ▾
Codable (Encodable + Decodable) is a Swift protocol that enables automatic JSON encoding/decoding. Structs that conform to Codable can be decoded with: let obj = try JSONDecoder().decode(Root.self, from: jsonData)
How do I decode JSON in Swift? ▾
let decoder = JSONDecoder(); let obj = try decoder.decode(Root.self, from: data). Use JSONDecoder.KeyDecodingStrategy.convertFromSnakeCase if your JSON uses snake_case keys.
Should I use struct or class for Swift data models? ▾
Use struct for data models — they're value types (copied when assigned), which prevents many bugs caused by shared mutable state. Use class only when you need reference semantics or inheritance.
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