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CalcForge

JSON to Swift Converter

Build Swift Codable structs from JSON samples for iOS and macOS apps.

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Codable models from API JSON

Swift clients decode JSON with Codable conformances tied to property names. CalcForge reads representative payloads and emits struct hierarchies you can paste into Xcode targets—speeding up integration with new backend endpoints.

Good fits

  • iOS networking layers using URLSession or Alamofire
  • SwiftUI apps binding decoded models to views
  • macOS menu bar utilities consuming JSON config
  • Quick models before swift-openapi-generator catches up
JSON:
{"title":"Note","done":false}

Swift:
struct Root: Codable {
    let title: String
    let done: Bool
}

Practical notes

  • Use `CodingKeys` when JSON keys differ from Swift naming guidelines.
  • Optional properties need `?` when keys may be absent in some responses.
  • Date strings may need custom `JSONDecoder.dateDecodingStrategy`—types often default to `String`.

Frequently asked questions

Are structs or classes generated?

Value-type structs are typical for Codable. Convert to classes manually if reference semantics are required.

Does it handle snake_case JSON keys?

Add `CodingKeys` enums to map snake_case API keys to camelCase Swift properties.

Can I generate for JSON arrays at root?

Decode with `[Element].self` using the generated element struct type.

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