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Convert JSON to Kotlin Data Classes

Generate Kotlin data class definitions from JSON data. Free online tool for Kotlin and Android developers.

🔒 100% Client-side⚡ Instant🆓 Free forever

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About Convert JSON to Kotlin Data Classes
Generate Kotlin data class definitions from JSON data. Free online tool for Kotlin and Android developers. This tool is part of the ConvertTOON developer tools suite, providing 40+ free online utilities for developers.
All processing happens entirely in your browser — your data never leaves your device. No sign-up required, no data collection, completely free and private.
💡 Looking for more tools? Visit ConvertTOON.com for JSON to TOON conversion, batch processing, and 40+ developer tools.
How to Convert JSON to Kotlin
  1. Paste your JSON data in the input panel
  2. The Kotlin output is generated automatically
  3. Click “Copy” to copy the result to clipboard
  4. Or click “Convert” to manually trigger conversion
Kotlin data classes are the idiomatic way to model JSON data in Kotlin and Android applications. Combined with kotlinx.serialization or Moshi, they provide type-safe JSON parsing with minimal boilerplate.
Frequently Asked Questions
Is my data secure?
Yes. All conversion happens 100% in your browser using JavaScript. No data is ever sent to a server.
Is there a file size limit?
The tool handles files up to several MB comfortably. For very large files, consider using our batch converter or API.
Can I use this programmatically?
Yes! We offer a free REST API at /api/convert/json-to-kotlin and an NPM package for Node.js integration.
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