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⚡ Advanced Developer Toolbox Transform, Mock, Security & API Client
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Class / Model to JSON: Keys:
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Paste JSON Payload

Paste raw JSON, drag & drop a .json file, or choose a workflow below:

○ Waiting for JSON | Lines: 0 · Chars: 0 · Size: 0 B · Depth: 0
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Generated Output

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Paste JSON in the input panel and hit Beautify or Generate to see results here.

JSON to Dart — Generate Flutter Models with fromJson/toJson

Flutter apps talk to APIs constantly, and every API call needs a Dart model class with factory fromJson(Map<String, dynamic> json) and toJson(). Paste your JSON payload here and get a complete, null-safe Dart class generated instantly.

Nested objects become separate classes. Arrays become List<T>. Field names that don't match Dart conventions get a @JsonKey(name: '...') annotation. The output works with json_serializable and standard manual deserialization patterns. Compatible with Dart 3 and Flutter 3.x.

❓ Frequently Asked Questions

Is processing on json-to-dart.html private and secure?

Yes. All JSON processing, parsing, and code generation happen 100% locally inside your browser sandbox. No server roundtrips or third-party tracking occur.

Is JSON Workbench free to use for JSON to Dart Class Generator (Flutter)?

Yes, JSON Workbench is completely free for commercial and personal developer use with zero registration or payload limits.

Can I copy or download the generated output?

Yes! You can instantly copy the output code to your clipboard or download it as a structured file.

🧰 Complementary Developer Tools

📝 JSON Formatter & Beautifier ⚖️ Visual JSON Diff ⚡ Class to JSON Converter ✨ JSON Mock Data Generator