JSON to Dart Converter
Generate Dart classes from JSON
JSON to Dart Converter is a free online tool from BrowserUtils that generate dart classes from json. It runs entirely in your browser — your data never leaves your device. No account required.
How to use JSON to Dart Converter
- 1 Paste or type your input into the editor above.
- 2 The tool processes your data instantly — right in your browser, with nothing sent to a server.
- 3 Copy the result with one click or continue editing your input.
About JSON to Dart Converter
Free online JSON to Dart converter. Automatically generate Dart classes with fromJson and toJson methods from JSON data. This tool runs entirely in your browser — your data is never sent to a server. Just paste your input, get instant results, and copy with one click. No sign-up or installation required.
JSON to Dart Converter specs
- Runtime
- 100% client-side (browser)
- Cost
- Free — no account, no rate limits, no usage caps
- Browser support
- Chrome 90+, Firefox 88+, Safari 14+, Edge 90+
- Part of
- 299 developer tools on BrowserUtils (100% client-side)
Questions
How do I generate Dart classes from JSON?
Paste your JSON into the input field and the tool will produce Dart classes with final properties, a constructor, and factory fromJson and toJson methods for serialization.
Are the generated classes compatible with Flutter?
Yes, the generated Dart classes follow Flutter conventions with fromJson factory constructors and toJson methods, ready for use with http and dio packages.
Does the JSON to Dart converter handle nested objects?
Yes, each nested JSON object becomes a separate Dart class with its own fromJson and toJson methods. The parent class references child classes by type for proper serialization.
Is the JSON to Dart converter safe for production data?
Yes, all parsing and code generation happen locally in your browser. No data is sent to any external server.
Can I use the generated Dart classes with json_serializable?
The output uses manual fromJson/toJson methods. If you prefer the json_serializable package, you can adapt the generated classes by adding @JsonSerializable() annotations and replacing the method bodies with generated code.
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