JSON to Language Struct / Class Generator
About JSON → Java Class
The JSON to Java POJO (Plain Old Java Object) & Record Converter transforms JSON payloads into modern Java 17+ Records or traditional Java POJO classes with Lombok (`@Data`, `@Builder`), Jackson (`@JsonProperty`), and Gson annotations.
How to Use JSON → Java Class
Step 1
Paste your JSON payload into the input area.
Step 2
Select Java style (Java Record, Lombok POJO, or Standard POJO).
Step 3
Specify root class name (e.g. `ProductDto`).
Step 4
Click "Copy Java Code".
Practical Use Cases for JSON → Java Class
Spring Boot REST API DTO Generation
Convert JSON request/response payloads into Java DTO records and POJOs for Spring Boot, Quarkus, and Micronaut backend microservices.
Legacy Java Android & Enterprise System Integration
Generate standard getter/setter POJOs with Jackson annotations for enterprise Java systems.
Input & Output Examples
Converting JSON to Java 17 Record
`{ "id": 1, "product_name": "Laptop", "price": 999.99 }``public record Product(\n Long id,\n @JsonProperty("product_name") String productName,\n Double price\n) {}`Key Features & Performance
- ✓Output styles: Modern Java 17+ `record`, Lombok `@Data`, or Standard POJO (Getters/Setters/Constructors).
- ✓Annotation libraries: Jackson (`@JsonProperty`), Lombok (`@Getter`, `@Setter`), Gson (`@SerializedName`), Jakarta Validation.
- ✓Recursively creates nested classes for deep JSON structures.
- ✓100% Client-Side memory execution.
- ✓1-Click Copy Java code.
Key Terminology & Definitions
Java Record (Java 14+)
A transparent immutable carrier for data, reducing boilerplate by automatically creating private final fields, getters, `equals()`, and `hashCode()`.
Lombok `@Data`
An annotation from Project Lombok that bundles `@ToString`, `@EqualsAndHashCode`, `@Getter`, and `@Setter` on POJO fields.