Convert JSON to Java POJO Class

Instantly generate Java classes from your JSON data with advanced options for Jackson annotations and JPA integration.

Input JSON
JSON
Settings
Generates multiple classes
Generated Java
Java

Understanding the Options

1. JPA Integration (@Column)

Enable this checking "JPA @Column". This appends the @Column annotation from javax.persistence to your fields, mapping them to database columns. Essential for Spring Boot JPA entities.

2. Jackson Serialization (@JsonProperty)

Use "Jackson @JsonProperty" to include the @JsonProperty annotation. This explicitly maps Java fields to JSON keys, ensuring correct serialization/deserialization even if field names differ.

3. Encapsulation (Getters/Setters)

Checking "Generate Getters & Setters" creates standard accessor and mutator methods for all fields, adhering to the Java Bean standard and promoting good encapsulation practices.

Example Transformation
Input JSON
{
"id": 123,
"name": "Sam Saji"
}
Output Java
public class Root {
    @Column(name = "id")
    private int id;

    @JsonProperty("id")
    public int getId() { return id; }
    public void setId(int id) { this.id = id; }

    // ... name field ...
}

Why use our JSON to Java Converter?

Modern full-stack development often requires seamless data interchange between frontend JSON payloads and backend Java objects. Our JSON to Java Converter simplifies this process, acting as a bridge between dynamic JSON structures and strongly-typed Java POJOs.

Whether you are building REST APIs with Spring Boot, consuming third-party services, or mapping database entities, manually creating Java classes can be tedious and error-prone. This tool automates the generation of boilerplate code, including fields, getters, setters, and library-specific annotations.

Key Use Cases:
  • API Development: Quickly generate DTOs for request/response bodies.
  • Legacy Integration: Map complex JSON from legacy systems to clean Java objects.
  • Testing: Create mock objects for unit tests based on real JSON responses.
How to use:
  1. Paste your JSON object into the left editor.
  2. Select your desired options (JPA, Jackson, Getters/Setters).
  3. Click Convert to generate the Java code.
  4. Use Copy to grab the code or Download to save as a file.