Question 1

How do I convert JSON to a Java class?

Accepted Answer

Paste your JSON into the input area. The tool infers each field's type (String, int, long, double, boolean, nested class or List), generates matching Java POJO classes and prints them with proper indentation. Click Copy to grab the code.

Question 2

How are numbers handled?

Accepted Answer

Integers become int (or long if they exceed Integer range), and decimals become double by default. Enable the BigDecimal option to use java.math.BigDecimal for every number, which avoids floating-point rounding for currency and high-precision values.

Question 3

Should I use getters and setters?

Accepted Answer

Encapsulated POJOs with private fields plus getters and setters are the JavaBeans standard and work with Gson, Jackson, JPA and most frameworks. For lightweight data carriers you can switch to public fields to keep the classes short.

Question 4

Does it add Gson or Jackson annotations?

Accepted Answer

Optionally. Enable Gson annotations to add @SerializedName on every field, or Jackson annotations to add @JsonProperty. This keeps your Java field names valid while mapping kebab-case or snake_case JSON keys.