JSON to Java.

Pandia turns a JSON document into Java classes — classic POJOs with private fields and public getters and setters. Numbers use boxed types (Long, Double) so nulls are representable, and nested objects and arrays become their own classes and List<T> fields.

Example

Input JSON:

{
  "id": 42,
  "name": "Ada",
  "active": true,
  "tags": ["admin", "early"]
}

Java output:

public class Root {
    private Long id;
    private String name;
    private Boolean active;
    private List<String> tags;

    public Long getId() { return this.id; }
    public void setId(Long id) { this.id = id; }
    public String getName() { return this.name; }
    public void setName(String name) { this.name = name; }
    public Boolean getActive() { return this.active; }
    public void setActive(Boolean active) { this.active = active; }
    public List<String> getTags() { return this.tags; }
    public void setTags(List<String> tags) { this.tags = tags; }
}

What you get

• POJO classes with private fields plus public getters and setters.
• Boxed types (Long, Double, Boolean) so every field is nullable.
• Nested objects and arrays become named classes and List<T>.
• Works with Jackson or Gson — add annotations if your setup needs them.

It’s the same engine behind Pandia’s type generation — opinionated, deterministic, and built to run on files far too large for an online converter.

Frequently asked questions

How do I generate Java classes from JSON?

Open the Types panel in Pandia, choose Java, and copy the generated classes — each field comes with a getter and setter.

Are these records or classic POJOs?

Pandia generates classic POJOs with getters and setters, which work on every Java version and with Jackson, Gson and most frameworks.

Does it work offline, even on big files?

Yes — everything runs locally with no upload, and Pandia handles multi-gigabyte documents without freezing.

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