JSON to Data Class
Generate TypeScript interfaces, Python dataclasses, or Kotlin data classes from JSON. Perfect for API response typing and data modeling.
How It Works
Paste your JSON object in the input area
Select your target language from 8 options
Click "Generate" to create your data class
Features
Frequently Asked Questions
Is this tool really free?
Yes, 100% free with no hidden costs or limits. All processing happens in your browser.
Are my files secure?
Absolutely. All generation happens locally in your browser – your data never leaves your device.
What languages are supported?
We support TypeScript, Python, Java, C#, Go, Kotlin, and PHP. All with proper type annotations and idiomatic code style.
JSON to Class Generator — The Complete Guide
Convert JSON to TypeScript, Python, Kotlin, and more with our free JSON to code generator. Instantly generate class from JSON data — saving hours of manual type definition and reducing errors in your codebase.
JSON to TypeScript Interfaces
Generate JSON to interface definitions for TypeScript. Paste your API response JSON and get properly typed interfaces with optional properties, nested types, and arrays all correctly defined. Essential for type-safe frontend development.
JSON to Python Class
Convert JSON to Python class definitions including dataclasses and Pydantic models. Our generator creates properly typed Python code with type hints, making it easy to work with API responses and maintain type safety in Python projects.
JSON to Kotlin Data Classes
Generate JSON to Kotlin data classes instantly. Perfect for Android development with Retrofit, our converter creates nullable types where appropriate and handles nested objects correctly for seamless JSON parsing.
Tips for JSON to Code Conversion
- Use realistic sample JSON with all possible fields
- Include null values to generate optional/nullable types
- Review generated code for appropriate naming conventions
- Test with edge cases in your actual data