JSON to Java POJO Generator
Convert a sample JSON object into Java classes with fields, getters, setters and nested object types.
How to use JSON to Java POJO Generator
Paste a representative JSON object and choose a root class name. The generator infers common Java wrapper types and creates nested static classes for nested objects. Review the result before production use, especially when JSON keys require serializer annotations or arrays contain mixed types.
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This tool runs locally in your browser. The values you paste or generate do not need to be sent to ToolHyv to perform the task.
Frequently asked questions
Does this add Jackson annotations?
No. It avoids forcing a JSON library dependency. Add Jackson, Gson or other annotations when your project requires them.
What happens with an empty array?
The generated type falls back to List<Object> because there is no sample value from which to infer an element type.
Does it compile every possible JSON schema?
No. It is a fast model scaffold from sample JSON, not a full JSON Schema compiler. Review naming, nullability and numeric types for your API contract.