JSON to Java Gson Converter

How to use

1. Paste a representative JSON response with nested fields and arrays.
2. Review the generated Java model classes and Gson annotations for key mapping.
3. Copy the classes into your Android or backend project and adjust package naming if needed.

Benefits

• Produces Java models tailored for Gson-based serialization workflows.
• Reduces repetitive POJO creation from nested API payloads.
• Helps preserve awkward JSON keys through generated annotations.

Best use cases

• Android apps using Gson for network payload parsing.
• Java services that map external API responses into typed models.
• Teams migrating from manual POJO maintenance to generated contracts.

Java Gson tips

• Keep one realistic payload sample so field names and collection types are inferred correctly.
• Review nullable fields and wrapper types before using the models in production.
• Group generated Gson models in a dedicated package for easier maintenance.

Implementation tips

• Review nullability and wrapper types for partially optional payloads.
• Keep generated models in a dedicated DTO or network package.
• Confirm any unusual JSON key names are preserved through annotations.

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 {
  @SerializedName("id")
  public Integer id;

  @SerializedName("name")
  public String name;

  @SerializedName("active")
  public Boolean active;
}

FAQ