JSON to Java Converter
Convert JSON to Java POJO classes for Java development
JSON Input
Java Output
What is JSON to Java Converter?
Need to generate Java POJO classes from your JSON (JavaScript Object Notation) data? This tool does that instantly. Perfect for Java developers working with Spring, Android, or enterprise applications who need to deserialize JSON into strongly-typed Java objects. Generate classes, getters, setters, and more automatically.
According to Java documentation, POJOs (Plain Old Java Objects) are essential for JSON processing and data binding. Our converter analyzes your JSON structure and generates proper Java classes. First, validate your JSON using our JSON Validator, then convert it to Java. You can also format your JSON with our JSON Formatter first if needed.
Everything happens in your browser – your JSON never leaves your computer. Convert, download, and use your Java classes right away.
What Makes This Tool Different
Automatic Class Generation
We analyze your JSON structure and automatically generate Java classes. JSON objects become classes, arrays become collections, everything gets proper Java types.
Lombok Support
Generate Java classes with Lombok annotations for cleaner code. Use @Data, @Getter, @Setter annotations to reduce boilerplate code.
Package Support
Configure package names to match your project structure. Generate code that fits seamlessly into your existing Java project organization.
File Upload Support
Got a big file? Just upload it. Works great for converting those massive JSON configs or data files without copy-pasting.
Download Java
One click to download your Java file. Drop it into your Java project and start using it. Perfect for Spring Boot, Android, or enterprise applications.
Clean Code Output
The generated Java code is clean and well-formatted. Classes are properly named, fields are typed correctly, and the code follows Java conventions.
How It Works
Paste or Upload JSON
Paste your JSON into the left editor, or click "Upload" to load a file. The JSON should be valid – use our JSON Validator first if you're not sure. You can also click "Sample" to see an example.
Configure Options
Set your class name, package name, and choose whether to use Lombok or nullable types. These settings customize the generated Java code to match your project's conventions.
Download or Copy
Click "Download" to save the Java file, or "Copy" to copy it to your clipboard. The Java code is ready to use in your project. Drop it into your Java project and start using it.
When You'd Actually Use This
Spring Boot Applications
Generate Java classes from JSON API responses for Spring Boot. Create POJOs for REST APIs or JSON-based configuration. Perfect for Spring's JSON processing support.
Android Development
Create Java classes from JSON data structures. Generate model classes for Android apps that work with JSON-based APIs or configurations.
Enterprise Applications
Generate Java classes from JSON schemas for enterprise systems. Create data models for REST APIs, JSON-based integrations, or microservices.
Code Generation
Generate Java code from JSON data structures. Perfect for creating data models, DTOs, or entity classes from JSON schemas or API responses.
Common Questions
Is my JSON data stored?
Nope. Everything happens right in your browser. Your JSON never leaves your computer – we don't even see it.
How are JSON objects handled?
JSON objects become Java classes. Properties become class fields, and nested objects become nested classes or references. Arrays become Java collections.
Can I use the generated Java code?
Yes. The generated Java code is valid and ready to use. Drop it into your Java project and start using it. You may want to review and refine the classes for your specific use case.
What about Lombok?
You can enable Lombok in the configuration options. This generates Java classes with Lombok annotations to reduce boilerplate code.
Does it work with large JSON files?
Yep. Since everything happens in your browser, it depends on your device. Small to medium JSON structures convert instantly. Really huge structures might take a few seconds.
What Java version is supported?
The generated code works with Java 8 and later. It uses standard Java features and follows JavaBean conventions for maximum compatibility.
Other JSON Tools You Might Need
Conversion is just one JSON task. Here are other tools that work well together:
Need to learn more about JSON? Check out the official JSON.org website or the comprehensive guide on MDN. For Java, check out the official Java tutorials.