JSON to Java Converter

How to use

1. Paste a representative JSON response with the fields, arrays, and nested objects your Java app actually consumes.
2. Review the generated POJO classes and Jackson-friendly property annotations for the inferred payload shape.
3. Copy the output into your backend or Android project and adapt package names, access modifiers, or validation annotations as needed.

Benefits

• Produces plain Java POJOs that are easy to adapt to Jackson, Spring MVC, or custom mapping layers.
• Keeps nested payloads in typed classes instead of unstructured maps.
• Reduces repetitive DTO scaffolding when API contracts change frequently.

Best use cases

• Spring Boot services that want quick DTO scaffolding from example API payloads.
• Jackson-based Java integrations that need serializer-agnostic starting models.
• Android or JVM projects that prefer plain POJOs before choosing a serializer-specific stack.

Plain Java tips

• Use this route when you want straightforward POJO scaffolding rather than Gson-specific helpers.
• Review primitive vs boxed types before shipping models that receive optional fields.
• Layer your own validation or Lombok annotations on top after the initial scaffold is generated.

Implementation tips

• Align field naming with your serializer strategy before production use.
• Review primitive vs boxed types when nullability matters.
• Group generated models in a dedicated package for maintainability.

Sample JSON

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

Sample output

public class UserModel {
  @JsonProperty("id")
  public Integer id;
  @JsonProperty("name")
  public String name;
  @JsonProperty("active")
  public Boolean active;
}

FAQ