JSON to Dart Converter

Generate plain Dart classes from sample JSON when you want lightweight model code without Freezed or json_serializable dependencies.

How to use

  1. Paste a representative JSON payload with the nested objects and arrays you need to model.
  2. Review the generated Dart classes and explicit parsing methods for the inferred field types.
  3. Copy the output into your app or backend project and adjust naming or nullability if your production payloads vary.

Benefits

  • Produces plain Dart classes with explicit parsing logic and minimal dependencies.
  • Fits projects that do not want annotation-based or Freezed-specific code generation.
  • Makes it easier to start with typed models in small Flutter or server-side Dart codebases.

Best use cases

  • Flutter apps that want lightweight DTOs without build_runner-heavy model tooling.
  • Server-side Dart services that prefer plain classes and explicit parsing methods.
  • Teams migrating from dynamic maps into typed Dart code a route at a time.

Plain Dart tips

  • Use this route when minimal dependencies matter more than generated annotations or immutable helpers.
  • Review nullability and collection handling against real API payload samples before shipping.
  • Switch to Freezed or json_serializable routes later if your model layer needs more automation.

Sample JSON

{
  "id": 101,
  "name": "Ada Lovelace",
  "active": true,
  "roles": ["admin", "editor"],
  "profile": {
    "email": "ada@example.com",
    "score": 9.8
  }
}

Sample output

// Dart output preview

FAQ

Why choose the standard Dart route over Freezed or json_serializable?

Choose the standard Dart route when you want readable plain classes and explicit parsing code without adding annotation or immutable-model tooling.

Can I still adapt the generated plain Dart classes later?

Yes. Plain Dart output is a lightweight starting point and can be refactored into Freezed or annotation-based models later if your project grows.