JSON to Java Code Generator

JSON to Java Class Converter – Generate Java POJOs from JSON

Use this free JSON to Java converter to generate Java classes (POJOs) from JSON data. Paste your JSON, click convert, and get Java fields and types that match your JSON structure.

It’s a quick way to build model classes for Spring Boot, Android apps, Jakarta EE, or any Java project that consumes JSON APIs.

What the JSON to Java Converter Does

The CodersTool JSON to Java generator:

• Parses JSON objects and arrays and infers suitable Java types.
• Creates Java class definitions with fields corresponding to JSON properties.
• Supports nested objects and lists by generating additional classes as necessary.
• Optionally includes getters/setters or Lombok annotations (depending on tool options).

How to Generate Java Classes from JSON

1. Paste your JSON

1. Copy the JSON sample from an API response or documentation.
2. Paste it into the JSON to Java converter input area.

2. Click “Convert to Java”

1. The tool analyzes the structure and infers Java types like String, int, double, boolean, List<T>, and nested classes.
2. You’ll see one or more generated Java classes that mirror your JSON.

3. Use the generated Java code

1. Copy the classes into your Java project.
2. Use them with libraries like Jackson, Gson, or Moshi to serialize and deserialize JSON.

Example – JSON to Java

Input JSON

{
  "id": 1,
  "name": "Example",
  "active": true
}

Generated Java Class

public class Root {
    private int id;
    private String name;
    private boolean active;

    public int getId() { return id; }
    public void setId(int id) { this.id = id; }

    public String getName() { return name; }
    public void setName(String name) { this.name = name; }

    public boolean isActive() { return active; }
    public void setActive(boolean active) { this.active = active; }
}

You can rename the root class, customize field names, or add annotations (like @JsonProperty) based on your project’s style.

Use Cases for JSON to Java Conversion

• Spring Boot REST clients – Generate request and response models from API JSON examples.
• Android development – Quickly build data models for mobile apps that consume JSON APIs.
• Integration projects – Reduce boilerplate when connecting Java services to third‑party JSON providers.
• Teaching and demos – Show how JSON types map to Java fields and classes.

Related Java & JSON Tools

• JSON Formatter – Format and validate JSON before converting.
• JSON Editor – Edit JSON documents in your browser.
• JSON to C# Class – Generate .NET models from the same JSON payloads.

Use this JSON to Java converter whenever you need to go from raw JSON to ready-to-use Java classes with just a few clicks.