JSON to Java
Convert JSON objects to Java type definitions, interfaces, or classes automatically.
About JSON to Java
Generate Java POJOs (Plain Old Java Objects) from JSON. The generator creates standard Java classes with private fields, getters, setters, and toString methods. These POJOs can be used directly with Jackson (the standard Java JSON library) for JSON serialisation and deserialisation. For modern Java, records (Java 16+) provide a more concise alternative that is also generated.
FAQ
How are null values handled?
Null values in JSON are mapped to nullable/optional types in the target language. In TypeScript: field: Type | null. In Go: *Type (pointer). In Python: Optional[Type]. In Java: Optional or @Nullable annotation. If a field is null in your sample JSON, consider providing a more complete sample where the field has a real value so the type can be accurately inferred.