Should I use Java Records or Classes?

If you are targeting Java 14 or higher (such as Java 17 or 21 LTS), Java Records are strongly recommended for DTOs and API models because they are concise, immutable, and natively supported by Jackson 2.12+. If you are maintaining a legacy code base or need mutable beans, select the 'Class' option.

Does this support Spring Boot?

Yes. The generated code uses standard Jackson annotations (@JsonProperty), which is the default JSON library in Spring Boot. You can drop the generated models directly into your Spring Boot controllers.

JSON to Java Converter

Convert JSON payloads into Java records or POJO classes with Jackson or Gson annotations, getters/setters, collections, and custom package configuration.

Target:

Load Template:

JSON Input21 lines · 507 chars

Java.java

Generated Java code will appear here

Paste or type valid JSON on the left to see instant, production-ready models.

Ready to compile · Deterministic output.java

100% Client-Side Privacy: Your JSON is parsed and compiled entirely in your browser using local Web APIs. Nothing is sent to any server.

Zero Network Transfer

What is the JSON to Java Converter?

The PriyGop JSON to Java Converter generates modern Java 17+ records or enterprise POJO classes with private fields and getters/setters. It seamlessly integrates popular serialization annotations including Jackson (@JsonProperty) and Google Gson (@SerializedName).

Java Generation Features

Java 17+ Records: Clean, immutable, boilerplate-free data carriers.
Enterprise POJOs: Generates default constructors, private fields, and standard JavaBeans getters and setters.
Boxed Nullables: Uses wrapper types (Integer, Long, Double) for nullable numbers.
Collections: Uses java.util.List<T> for array fields.

Our Tool Features

Why developers and engineers prefer this tool for everyday development workflows.

Cross-Device Compatibility

Works seamlessly on all modern desktop, tablet, and mobile browsers including Chrome, Firefox, Safari, Edge on Windows, macOS, Linux, Android, and iOS.

Fast In-Browser Execution

Processes your data in real-time directly inside your browser. No queue wait times, no network round-trips, and zero latency.

100% Client-Side Privacy

Your code, tokens, passwords, and files are never transmitted to any external server or saved in logs. Everything runs locally in memory.

Instant File & Clipboard Input

Supports one-click sample loading, file drag-and-drop, and pasting directly from your clipboard (Ctrl + V) for effortless workflows.

Strict Standards Compliant

Built strictly according to official specifications (RFCs, W3C, ISO, and standard cryptographic algorithms) ensuring accurate output every time.

Unlimited Free Usage

No registration, no accounts, no subscriptions, and no hidden daily quotas. Use this tool as many times as you need without restrictions.

Recent Updates & Improvements

Continuously maintained and improved based on developer feedback.

Client-Side Speed & Performance UpgradeRecent Update

Optimized processing algorithms with Web Workers and native browser APIs (SubtleCrypto, Canvas 2D) for instantaneous zero-latency execution.

Clipboard Paste & Drag-and-Drop AddedFeature Added

Added instant clipboard pasting (Ctrl + V) and drag-and-drop file support to accelerate developer productivity without manual downloads.

Enhanced Mobile & Touch Device ExperienceUI/UX Update

Redesigned responsive touch controls, flexible copy buttons, and camera preview framing for mobile and tablet browsers.

How To Use JSON to Java Converter Online?

Follow these quick steps to get instant, accurate results in seconds.

Input JSON

Paste your API response or data object.

Paste any valid JSON payload into the input editor.
Click 'Sample' to load a sample user profile.

JSON PayloadClient-Side

{
  "id": 101,
  "customer_name": "Acme Corp",
  "active": true
}

Instant ExecutionReady

Select Java Architecture

Choose between Records or Classes, Jackson or Gson.

Choose 'Java Record' for concise modern Java.
Select 'Jackson' or 'Gson' for serialization annotations.
Configure your custom package name (e.g. com.mycompany.models).

Java Record OutputClient-Side

public record Customer(
    @JsonProperty("customer_name") String customerName
) {}

Instant ExecutionReady

Download Java File (.java)

Export clean code ready for your Spring Boot or Android project.

Click 'Copy Code' or 'Download' to save the .java source.

Usage in Spring BootClient-Side

Customer c = objectMapper.readValue(json, Customer.class);

Instant ExecutionReady

Supported Formats & Syntax Examples

Common input data types and real-world representations supported by this tool.

Modern Java 17+ Record

Record

Immutable data carrier with Jackson annotations.

Example Syntax

package com.example.models;

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

public record User(
    @JsonProperty("id") Long id,
    @JsonProperty("user_name") String userName,
    @JsonProperty("roles") List<String> roles
) {}

Eliminates hundreds of lines of boilerplate getters, setters, and equals/hashCode.

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package com.example.models; import java.util.List; import com.fasterxml.jackson.annotation.JsonProperty; public record User( @JsonProperty("id") Long id, @JsonProperty("user_name") String userName, @JsonProperty("roles") List<String> roles ) {}