Processed in your browser. Your data never leaves your device.
← Back to tools
JSON to Code Generator
Generate typed code from JSON in 8 languages — Go structs, Python dataclasses, Java/C#/Dart/Kotlin classes, Rust/Swift structs. Handles nested objects, arrays, and null values.
Supported Languages
| Language | Output Type | Serialization |
|---|---|---|
| Go | Structs with json tags | encoding/json |
| Python | Dataclasses with type hints | dataclasses |
| Java | Classes with getters/setters | Jackson / Gson |
| C# | Classes with JsonPropertyName | System.Text.Json |
| Dart | Classes with fromJson/toJson | dart:convert |
| Rust | Structs with serde derive | serde |
| Swift | Codable structs | Codable |
| Kotlin | Data classes with @Serializable | kotlinx.serialization |
How It Works
- Nested objects — each nested object becomes a separate named type/class/struct, referenced by the parent.
- Arrays — element types are inferred from the first item. Object arrays merge all items for complete field coverage.
- Numbers — integers and floats are detected automatically (e.g.,
int64vsfloat64in Go). - Null values — mapped to each language's nullable/optional type (e.g.,
Any?in Kotlin,Optionin Rust). - Naming conventions — field names follow each language's idiom (camelCase, snake_case, PascalCase) with JSON key annotations.
- Everything runs in your browser — no data is sent over the network.
Related Convert Tools
IMG
Image to Base64
Convert images to Base64 data URIs or decode Base64 back to images
TS
JSON to TypeScript
Generate TypeScript interfaces and type aliases from JSON data
H↔M
HTML ↔ Markdown
Convert between HTML and Markdown in either direction
CMP
Image Compressor
Compress and resize images with adjustable quality — JPEG, WebP, and PNG