JSON to Java Class
FreeGenerate Java POJO classes from JSON objects
public class Root {
private int id;
private String name;
private boolean active;
}About JSON to Java Class
In Java, mapping a JSON response usually means a POJO with private fields, getters, and setters, and hand-coding one for every API payload is a classic chunk of boilerplate. This tool reads a JSON sample and generates Java classes so you can deserialize responses into typed objects with a serialization library instead of writing the plumbing yourself.
Paste a representative JSON object and the converter creates Java classes with typed fields and accessor methods, generating nested classes for nested objects. It is free, runs in your browser, needs no signup, and returns the classes instantly. Because the model is inferred from a single sample, provide a complete example and review types and any fields that may be null before using the classes in your project.
Common uses
- Generating Java POJOs for a JSON API response
- Creating typed classes to deserialize JSON with Jackson or Gson
- Bootstrapping nested classes from a structured JSON payload
- Saving boilerplate when modeling JSON in a Java service
- Getting a draft POJO to refine for your serialization setup
How to use
- 1
Configure options
Set your preferences using the options panel below.
- 2
Click Generate
Click the process button to generate your result instantly.
- 3
Copy or download
Copy the result to clipboard or download it directly to your device.
Why ToolHub?
- Accurate conversion
- Multiple formats
- Instant results
FAQ
Does it include getters and setters?
Generated POJOs typically include fields with accessor methods, which most Java serialization libraries rely on.
How are nested objects handled?
Nested JSON objects become their own Java classes referenced from the parent, keeping the model structured and typed.
How are numbers typed?
Numeric types are inferred from the sample values, so review whether int, long, or double is correct for your data.
Will it add serialization annotations?
Output may need library-specific annotations depending on your setup, so adapt the generated classes for Jackson, Gson, or your chosen library.
Can I use JSON to Java Class on mobile?
Yes — ToolHub is fully responsive and works on iPhone, Android, tablets and all modern browsers. No app install needed.