JSON to Java POJO Converter (with Jackson)

Convert JSON to Java POJOs with Jackson @JsonProperty annotations, camelCase field names, List<T> for arrays, and generated getters/setters. Optional package declaration. 100% local.

Last updated: July 20, 2026

Root class:Package:

JSON Input

135 chars · 7 lines

Java Output (POJO + Jackson)

import com.fasterxml.jackson.annotation.JsonProperty;
import java.util.List;

public class Profile {
    private long age;
    private String city;

    public long getAge() { return this.age; }
    public void setAge(long age) { this.age = age; }
    public String getCity() { return this.city; }
    public void setCity(String city) { this.city = city; }
}

public class User {
    private long id;
    private String name;
    private boolean active;
    private List<String> roles;
    private Profile profile;

    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 isActive() { return this.active; }
    public void setActive(boolean active) { this.active = active; }
    public List<String> getRoles() { return this.roles; }
    public void setRoles(List<String> roles) { this.roles = roles; }
    public Profile getProfile() { return this.profile; }
    public void setProfile(Profile profile) { this.profile = profile; }
}

Paste JSON to generate Java POJOs with Jackson @JsonProperty annotations, camelCase field names, List<T> for arrays, and getters/setters. Optional package declaration. 100% local.

Tips & Best Practices

▸For Lombok, delete the generated getters/setters and add @Data on the class.
▸For Java 17+ records, replace 'public class Foo { … }' with 'public record Foo(Type1 f1, …) {}'.
▸Jackson is the de-facto JSON library in Spring Boot; the annotations preserve original JSON keys where they differ from Java naming.

Frequently Asked Questions

Which JSON library is the output tuned for?

Jackson (the de-facto standard in Spring Boot). Fields that don't match Java camelCase get a @JsonProperty("...") annotation so deserialization from the original JSON keys still works.

Does it generate getters and setters?

Yes. Boolean fields get isX() naming; all others get getX() / setX(). If you prefer Lombok, delete the getters/setters and add @Data at the class level.

Can I convert to a Java Record instead?

The current output targets classic POJOs for maximum compatibility (Java 8+). For Java 17+ records, replace `public class Foo { … }` with `public record Foo(Type1 field1, …) {}` — the field types are already correct.

Is my JSON uploaded anywhere?

No. All conversion happens locally in your browser.

JSON to Java POJO Converter (with Jackson)

Tips & Best Practices

Frequently Asked Questions

Comments

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