JSON to Java Converter
Convert JSON to Java POJO classes for Java development
JSON Input
Java Output
What is JSON to Dart Converter?
Need to generate Dart classes from your JSON (JavaScript Object Notation) data? This tool does that instantly. Perfect for Dart developers working with Flutter, web apps, or server-side Dart who need to deserialize JSON into strongly-typed Dart objects. Generate classes, json_serializable support, and type definitions automatically.
According to Dart documentation, classes and JSON serialization are essential for Flutter and Dart development. Our converter analyzes your JSON structure and generates proper Dart classes. First, validate your JSON using our JSON Validator, then convert it to Dart. 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 Dart classes right away.
What Makes This Tool Different
Automatic Class Generation
We analyze your JSON structure and automatically generate Dart classes. JSON objects become classes, arrays become List<T>, everything gets proper Dart types.
Json Serializable Support
Generate Dart classes with json_serializable annotations for seamless JSON encoding and decoding. Works great with Flutter and Dart's JSON processing.
Nullable Types
Use nullable types for properties that might be null. Perfect for Dart's null safety system and safe JSON decoding.
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 Dart
One click to download your Dart file. Drop it into your Dart or Flutter project and start using it. Perfect for mobile apps, web apps, or server-side Dart.
Clean Code Output
The generated Dart code is clean and well-formatted. Classes are properly named, properties are typed correctly, and the code follows Dart 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 json_serializable or nullable types. These settings customize the generated Dart code to match your project's conventions.
Download or Copy
Click "Download" to save the Dart file, or "Copy" to copy it to your clipboard. The Dart code is ready to use in your project. Drop it into your Dart or Flutter project and start using it.
When You'd Actually Use This
Flutter Development
Generate Dart classes from JSON API responses for Flutter apps. Create models for REST APIs or JSON-based configurations. Perfect for Flutter's JSON processing needs.
Web Applications
Create Dart classes from JSON data for Dart web apps. Generate data models for JSON-based APIs or configurations. Perfect for Dart web development.
Server-Side Dart
Generate Dart classes from JSON data for server-side Dart applications. Create data models for JSON-based APIs or configurations. Perfect for Dart server frameworks.
Code Generation
Generate Dart 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 Dart classes. Properties become class properties, and nested objects become nested classes or references. Arrays become List<T>.
Can I use the generated Dart code?
Yes. The generated Dart code is valid and ready to use. Drop it into your Dart or Flutter project and start using it. You may want to review and refine the classes for your specific use case.
What about json_serializable?
You can enable json_serializable in the configuration options. This generates Dart classes with json_serializable annotations for seamless JSON encoding and decoding.
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 Dart version is supported?
The generated code works with Dart 2.0 and later. It uses standard Dart features and follows Dart 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 Dart, check out the official Dart documentation.