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JSON to Dart Class

Convert JSON to Dart class definitions with fromJson constructors and null safety

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About This Tool

JSON to Dart Class converts JSON data into Dart class definitions with automatic type detection. It generates clean Dart model classes with final fields, required constructor parameters, and fromJson factory constructors for easy serialization. This tool is ideal for Flutter developers building data models from API responses.

Key Features

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Use Cases

json dart flutter class

Frequently Asked Questions

What is JSON to Dart Class?

JSON to Dart Class is a browser-based tool that converts JSON data into Dart class definitions with automatic type detection. It generates classes with final fields, required constructors, and fromJson factory methods.

Does it support null safety?

Yes, when the nullable option is enabled, the tool marks fields with null values as nullable types (e.g., dynamic?). This ensures compatibility with Dart's sound null safety.

Does it handle nested objects?

Yes, the tool automatically generates separate Dart classes for nested JSON objects. Each nested class includes its own fromJson factory constructor for proper deserialization.

Can I customize the root class name?

Yes, you can set a custom root class name using the Root name input field. The default name is "Root" but you can change it to match your project's naming conventions.

Is my JSON data sent to any server?

No. All conversion happens locally in your browser. Your JSON data is never uploaded or transmitted to any server, keeping it completely private and secure.