JSON to Java POJO
Generate Java POJOs, Lombok @Data classes or records with Jackson annotations from JSON. Free and private: runs in your browser.
Paste a sample JSON response to get Java classes for every nested object.
Runs entirely in your browser. Nothing you paste is uploaded or stored.
Use cases
- Move data between APIs, config files and databases.
- Bootstrap models from a sample API response.
- Save time on repetitive hand-written boilerplate.
Frequently asked questions
Why are numbers Integer instead of int?
Boxed types can be null, which matches JSON where a field may be missing. Switch to primitives if a field is always present.
Is the JSON to Java POJO free?
Yes. It is free with no sign-up, and it runs entirely in your browser, so your input is never uploaded or stored.
Should I use the generated output as-is?
Treat it as a strong starting point. Types are inferred from your sample, so review nullability, naming and edge cases before committing it.
Related tools
Checking one snippet is a start. Scan your whole repository for free with CodeInspector.