JSON to Java converter

Convert JSON to Java classes with getters and setters in your browser. Paste or drop a file — nothing is uploaded.

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Paste or drop .json

Nothing leaves this device. No account required.

Generate Java from JSON locally

Backend and Android code often need POJOs that mirror a JSON document. Generating Java classes with private fields plus getters and setters from a sample payload is faster than typing boilerplate by hand, especially for nested objects and lists.

What the Java output includes

  • Each object becomes a public class with private fields
  • Accessors use getX/setX; boolean fields use isX/setX
  • JSON arrays map to java.util.List; optional or nullable fields use boxed types
  • Mixed or unknown shapes fall back to Object

How to convert JSON to Java

  1. Paste JSON or drop a .json file into the converter.
  2. Set a Root class name if you want something other than Root, then convert.
  3. Copy or download the Java sources — everything stays on your device.

FAQ

Is this JSON to Java converter free?
Yes. Formatly builds Java classes from JSON in the browser for free, with no signup.
Do you upload my JSON files?
No. Inference and code generation run entirely in your browser. Files never leave this device.
Why List instead of arrays?
java.util.List matches common Jackson/Gson deserialization defaults and stays readable for nested collections.

Other code generators

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