What is a JSON to Dart converter?

A JSON to Dart converter transforms JSON data into typed Dart classes with fromJson and toJson methods, ready for use in Flutter mobile applications.

Does it support Dart null safety?

Yes, the converter generates Dart classes with full null safety support (Dart 2.12+), using nullable types and required parameters as appropriate for your data structure.

Can I convert nested JSON to Dart models?

Yes, nested JSON objects are automatically converted into separate Dart classes with proper type references and serialization methods for each level.

Is the generated code ready for Flutter?

Yes, the generated Dart classes include fromJson constructors and toJson methods compatible with Flutter's standard JSON serialization patterns and state management solutions.

What additional methods can be generated?

Beyond fromJson and toJson, the converter can generate copyWith methods for immutable state updates, Equatable integration for value equality, and toString overrides for debugging.

Is my data processed securely?

Yes, all JSON to Dart conversion happens locally in your browser. No data is uploaded to any server, making it safe for proprietary API schemas and sensitive data.

JSON to Dart Converter - Flutter Models with Null Safety

Convert JSON to Dart classes instantly. Generate Flutter-ready code with null safety, serialization (fromJson/toJson), and type safety for mobile development.

JSON Input

Try different Dart patterns like Null Safety, fromJson, etc.

Ln 1, Col 1

Size: 615 B

Try different Dart patterns like Null Safety, fromJson, etc.

No Dart Class Outputs Generated

Paste your data above and click the button to see the results here.

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JSON to Dart Converter - Flutter Development Tool

Transform JSON data to typed Dart classes ideal for Flutter applications, mobile development, and state management. Supports null safety, serialization methods, and modern Dart patterns. Generate production-ready Dart models with full null safety compliance (Dart 2.12+).Related Tools: JSON to POJO, JSON Editor, JSON Formatter, Fix JSON

Key Features of OJF

Take control of your data - everything in one place

Dart Class Generation Features

Convert JSON to typed Dart classes with null safety
Automatic property name conversion (snake_case to camelCase)
Nested class generation for complex JSON structures
Generic List type handling for arrays
fromJson() factory constructor generation
toJson() method for serialization
copyWith() method for immutable updates
Equatable package integration for value equality

Flutter Development Integration

Flutter-ready classes with proper typing
State management compatible (BLoC, Provider, Riverpod)
HTTP response model generation
Local storage serialization support
Custom class and property naming
Reserved keyword handling
Null safety compliance (Dart 2.12+)
Performance optimized code generation

JSON to Dart Conversion for Flutter

Paste your JSON API response or data structure

Configure class name and generation options

Enable null safety and serialization methods

Choose additional features like copyWith or Equatable

Generate typed Dart classes for your Flutter project

Copy or download the generated .dart files

Import into your Flutter app and use with confidence

Why Choose Us?

Feature	Online JSON Formatt(OJF)	Other Tools
Null Safety Support	Full Dart 2.12+ compliance	Basic typing only
Method Generation	fromJson, toJson, copyWith	Basic constructors
Nested Classes
Flutter Integration	Optimized for Flutter	Generic Dart only

Frequently Asked Questions

How do I use the generated Dart classes in Flutter?

The generated classes include fromJson() and toJson() methods for easy API integration. Use them with http packages, dio, or any JSON API client. The classes are designed to work seamlessly with Flutter state management solutions.

What is null safety and should I enable it?

Null safety is a Dart language feature that helps prevent null reference errors. Enable it for all new Flutter projects (Dart 2.12+). It makes your code more reliable and helps catch potential bugs at compile time.

When should I use the copyWith method?

The copyWith method is useful for immutable state management, particularly with BLoC, Provider, or Riverpod. It allows you to create modified copies of objects without mutating the original, which is essential for reactive programming patterns.

What is the Equatable package and when should I use it?

Equatable simplifies value equality comparisons in Dart. Enable it when you need to compare object instances by their values rather than references, which is common in state management and testing scenarios.