JSON to Scala3 Converter

How to use

1. Paste a representative JSON payload that reflects the request, response, or dataset shape your Scala code needs to model.
2. Review the generated `final case class` definitions, inferred `Option` fields, and nested child types.
3. Copy the output into your project and add Circe, Play JSON, or domain-specific derivation helpers where needed.

Benefits

• Produces idiomatic Scala 3 case-class scaffolding that is easier to integrate than hand-written models from scratch.
• Keeps nested payload structure explicit for typed JVM services and pipelines.
• Provides a clean starting point before serializer-specific or domain-specific refinement.

Best use cases

• Scala 3 services that need typed transport models for REST payloads or queued events.
• Data pipelines and JVM apps that benefit from case-class-based JSON contracts.
• Teams standardizing on case classes before adding Circe, Play, or custom codecs.

Scala 3 case-class tips

• Review `Option`, numeric types, and collection shapes before treating generated classes as stable contracts.
• Add encoder or decoder derivation after generation so transport scaffolding stays serializer-agnostic.
• Keep generated case classes separate from richer domain models when business invariants diverge from payload structure.

Sample JSON

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

Sample Scala 3 output

final case class UserModel(
  id: Int,
  name: String,
  active: Boolean,
  roles: Seq[String]
)

FAQ