How to use this developer tool
- Choose a conversion mode.
- Paste valid JSON or a simple Kotlin data class or enum.
- Enter the root class name.
- Convert and review nullable and dependency notes.
#180 · Programming Language Tools Developer Tool
Kotlin Converter
Convert JSON into Kotlin data classes or translate simple Kotlin models into TypeScript and Java. Generate nullable mappings, annotations, nested models, and dependency notes.
Developer Input
Browser-based processingclass
Ad space
What this developer tool does
The converter parses supported model structures, maps primitive and collection types, and reports nullability and unsupported-type warnings for manual review.
Parse source → infer or extract fields → map Kotlin and target types → generate declarations and optional annotations → report dependencies and warnings.
Review nullable policies, numeric ranges, dates, BigDecimal, UUID, nested model strategy, and serialization-library choices before production use.
Example
The page loads a working Kotlin Converter example. Run the tool to compare the sample input with the generated output and status summary.
Tips for better output
- Start with valid, isolated code or data.
- Review heuristic and inferred results manually.
- Use the official compiler, formatter, linter, or IDE before production use.
FAQ
How do I convert JSON to a Kotlin data class online?
Choose JSON to Kotlin Data Class, paste valid JSON, enter a class name, and run the converter.
How are JSON null values mapped to Kotlin?
They are generated as nullable properties with a fallback type that should be reviewed.
Can I convert a Kotlin data class to TypeScript or Java?
Yes. Common Kotlin primitive, nullable, list, and map types are translated for simple model declarations.
Can this browser tool replace the official compiler or IDE inspection?
No. It performs browser-based formatting, conversion, structural parsing, or heuristic analysis. Always verify production code with the official toolchain.
Does this tool upload my source code?
No processing is implemented by the page itself in your browser. Review your hosting and analytics configuration separately if you add external services.
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Tool coverage
| Module | Coverage |
|---|---|
| Inputs | JSON, Kotlin data class, enum |
| Outputs | Kotlin, TypeScript, Java |
| Review | Nullability and annotations |