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Paste JSON and instantly generate Java classes with nested models, Jackson annotations, and Lombok support.
JSON Input
Java Output
Parser: JSON
Generated from local input only. No data is uploaded.
Every tool runs entirely in your browser. Nothing you type is uploaded, stored, or logged on our servers.
The JSON to Java Class Generator turns a JSON snippet into ready-to-use Java classes. Paste an API response or config sample and it infers a field for every value — strings, numbers, booleans, nested objects, and lists — creating a separate class for each nested shape it discovers.
Choose a root class name and optional package, then toggle Lombok to generate @Data-annotated classes instead of manual getters and setters, or enable Jackson annotations so fields whose JSON key doesn't match Java naming get an explicit @JsonProperty.
This JSON to POJO generator is useful for quickly scaffolding Java model classes from API responses, sample payloads, or test fixtures without typing each field by hand. It runs entirely in your browser — no JSON data is uploaded.
It parses your JSON, infers a type for every field (String, int, boolean, List, nested object, etc.), and generates a Java class for each object shape it finds, including nested and array item classes.
Yes. Enable the Lombok toggle to generate classes annotated with @Data instead of manual getters and setters, keeping the output shorter for projects that already depend on Lombok.
When enabled, each class gets @JsonIgnoreProperties(ignoreUnknown = true) and fields whose JSON key doesn't match its camelCase Java name get @JsonProperty, so the class deserializes correctly with the Jackson library.
Wrapper classes (Integer, Boolean, Double) are the safer default because they support null values. Primitives (int, boolean, double) are more memory-efficient but only used automatically for fields that are never null or missing.
No. Parsing and class generation run entirely in your browser — no JSON content is sent to a server.