JSON to Dart Freezed Converter

How to use

1. Paste a representative JSON response with the nullable fields, arrays, and nested objects your Flutter app actually consumes.
2. Review the generated Freezed factories, child models, and serializer helpers for the inferred payload shape.
3. Copy the output into your Flutter model layer and run your normal build_runner workflow if needed.

Benefits

• Produces immutable Freezed models that fit copyWith-heavy Flutter state and DTO layers.
• Keeps nested JSON payloads in dedicated typed models instead of raw dynamic maps.
• Reduces handwritten model maintenance when API contracts change frequently.

Best use cases

• Flutter apps that standardize on Freezed for immutable DTOs and state models.
• Teams that want value equality and copyWith-style updates on generated API contracts.
• Projects turning large JSON payloads into maintainable client-side model trees quickly.

Dart Freezed tips

• Keep root model names stable so generated class and part names remain predictable.
• Review nullable fields carefully before committing generated contracts into production code.
• Split oversized payload examples into focused model groups if one response produces too many nested types.

Sample JSON

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

Sample output

// Dart (Freezed) output preview

FAQ