JSON to Java
Convert JSON to Java POJO classes with getters and setters, ready for Jackson. Nested objects become classes. Runs entirely in your browser.
JSON input
Generated Java
What this tool does
This JSON to Java converter takes a JSON document and generates Java type definitions from its shape. It runs entirely in your browser — your data never leaves the page.
How it works
1. Infer types. Every value is inspected: strings, numbers, booleans, null, arrays and nested objects.
2. Merge shapes. Array items are merged so optional fields stay optional.
3. Name fields. Keys become valid target-language identifiers.
4. Emit code. Java definitions preserve original JSON keys.