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.
How to Use JSON to Dart
Follow these steps to convert JSON to Dart classes. Each step uses the actual buttons and panels on this page.
Paste, Upload, or Load Sample
Paste your JSON into the left JSON Input panel, or click Upload to load a .json or .txt file. Click Sample to see example JSON. Example input:
{"subscriberId":"SUB-1001","plan":"Unlimited 5G","dataUsage":45.2,"status":"active"}Invalid JSON will show an error. Use our JSON Validator first if unsure. Configure class name, package, Lombok, and nullable types in the options above.
View Generated Dart Output
The right Dart Output panel shows the generated Dart classes instantly. JSON objects become classes with json_serializable, arrays become List<T>.
Download or Copy
Click Download to save the Dart file, or Copy to copy to your clipboard. Use Clear on the input panel to start over. All processing runs in your browser.
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. Check out the ECMA-404 standard for more details.
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>. Check out the RFC 8259 for more details.
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: