Convert JSON to Java Classes (POJO) Online
Convert JSON into Java classes (POJO), right in your browser.
Uses java.util.List for arrays.
🔒 100% client-side — no data sent
Turn any JSON payload into Java classes (POJOs) with basic annotations, ready to paste into your project. Everything runs 100% in your browser, so no data is ever sent to a server and your models stay private. A quick way to save time when wiring up a REST API.
What is it for?
- ▸ Generate POJOs from a REST API response
- ▸ Quickly create models for Jackson or Gson deserialization
- ▸ Map a complex JSON document to typed Java objects
- ▸ Prototype an HTTP client without hand-writing the classes
FAQ
How do I convert JSON to a Java class?
Paste your JSON into the left field and the tool instantly generates the matching Java classes with inferred types and basic annotations, ready to copy straight into your code.
Does the tool add Jackson annotations?
It generates the basic annotations needed to map fields. You can then adapt or complete them with Jackson or Gson annotations depending on your library.
Is my JSON data sent to a server?
No, the conversion runs entirely in your browser. No data is transmitted or stored, keeping your data models fully private.