JSON to Java Class
Generate Java classes from JSON data
JSON to Java Class is a free online tool from BrowserUtils that generate java classes from json data. It runs entirely in your browser — your data never leaves your device. No account required.
How to use JSON to Java Class
- 1 Paste or type your input into the editor above.
- 2 The tool processes your data instantly — right in your browser, with nothing sent to a server.
- 3 Copy the result with one click or continue editing your input.
About JSON to Java Class
Free online JSON to Java converter. Generate Java POJO classes with proper types and getter/setter methods from JSON. This tool runs entirely in your browser — your data is never sent to a server. Just paste your input, get instant results, and copy with one click. No sign-up or installation required.
JSON to Java Class specs
- Runtime
- 100% client-side (browser)
- Built on
- Native JavaScript JSON.parse / JSON.stringify (RFC 8259 compliant)
- Cost
- Free — no account, no rate limits, no usage caps
- Browser support
- Chrome 90+, Firefox 88+, Safari 14+, Edge 90+
- Part of
- 299 developer tools on BrowserUtils (100% client-side)
Questions
What Java class structure is generated?
The tool generates a POJO class with private fields, a default constructor, and public getter/setter methods for each JSON property, following standard Java conventions.
How are nested JSON objects handled?
Nested objects generate separate inner or companion classes, with the parent class referencing them as typed fields.
Does the output work with Jackson or Gson?
Yes, the generated POJOs are compatible with Jackson, Gson, and other Java JSON serialization libraries out of the box.
How are JSON arrays mapped in Java?
JSON arrays are mapped to List<T> where T is the inferred type of the array elements, such as List<String> or List<MyNestedClass>.
Can I use the generated Java class with Spring Boot?
Yes, the generated POJOs work with Spring Boot REST controllers and Jackson serialization out of the box. You can use them as request/response body types directly.
How do I generate Java classes from a REST API response?
Copy a sample JSON response from your API, paste it into the tool, and get Java class definitions with proper types and annotations that you can add to your project.
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