JSON to Dart

Convert JSON to Dart class.

This tool is designed to provide a seamless experience for developers by handling complex operations directly in your browser with maximum speed and security.

100% Private

Instant Results

Customizable

Offline Ready

Dev-Friendly

Easy Export

Dart is a client-optimized language for fast apps on any platform. It is the language used by the Flutter framework for building natively compiled applications for mobile, web, and desktop from a single codebase.

Read the Full Guide

It converts JSON data into clean, modern Dart classes, specifically optimized for use in Flutter and other Dart-based applications. The tool intelligently identifies data types and creates the necessary class structure for working with JSON, including support for nested objects, arrays, and type safety features. It also generates factory constructors and helper methods for easy serialization and deserialization, allowing you to seamlessly integrate external API data into your Flutter UI and state management systems. Whether you are building a simple mobile app or a complex cross-platform service, this tool ensures that your Dart models are consistent and reliable.

Input your JSON to generate Dart classes. It includes `fromJson` and `toJson` factory methods for easy serialization.

Dart is the core language for Flutter development, and manually creating data models for complex JSON responses can be a repetitive and error-prone task. This tool automates the process, generating clean and typed Dart code that follows best practices for data handling, saving you significant development time and helping you build more robust and maintainable applications.

Example Input

{
  "id": 1,
  "name": "John Doe",
  "email": "john@example.com",
  "isActive": true,
  "tags": ["admin", "dev"],
  "profile": {
    "bio": "Software Engineer",
    "skills": ["Go", "React", "TypeScript"]
  }
}

Example Output

class User {
  final int id;
  final String name;
  final String email;
  final bool isActive;

  User({required this.id, required this.name, required this.email, required this.isActive});

  factory User.fromJson(Map<String, dynamic> json) => ...
}

Null Safety

Fix: The tool generates null-safe Dart code. Ensure your project is configured for null safety (Dart 2.12+).

Does it support json_serializable?

Yes, you can choose to generate code compatible with the `json_serializable` package.

How to Convert JSON to Dart Classes for Flutter – Complete In-Depth Guide (2026)

How to convert JSON to Dart classes for Flutter in 2026. In-depth guide covering Dart model best practices, null safety, immutable classes, code generation with json_serializable & freezed, Flutter integration with Riverpod, and real-world architecture tips from a Principal Software Engineer with 15+ years experience.

What is JSON? How to Format, Validate & Use It (Complete Guide 2026)

What is JSON? How to Format, Validate & Use It (Complete Guide 2026). In-depth explanation of JSON syntax, real-world use cases, formatting best practices, common mistakes, advantages, disadvantages, and expert tips from a Principal Software Engineer with 15+ years experience.