JSON to Java
Paste a JSON object or API response and get Java POJO classes with getters and setters instantly.
Frequently Asked Questions
What kind of Java code does this generate?
Standard POJO (Plain Old Java Object) classes — private fields with public getter and setter methods for each field, which is the conventional style expected by Jackson, Gson, and most Java frameworks.
How are JSON numbers typed in Java?
A whole number like 30 is typed as int; a decimal like 9.5 is typed as double. If your API can return larger integers, you may need to widen int to long manually.
What happens with nested objects?
Each nested object generates its own class, named after the field it appeared under, and is referenced as the field's type in the parent class.
What does a JSON array become?
A field typed as List<T>, where T is inferred from the first array element — a plain type like String, or a generated class for arrays of objects. Import java.util.List; is added automatically.
Is my JSON uploaded anywhere?
No. Code generation runs entirely in your browser — nothing is sent to a server.