JSON to Code — Struct & Type Generator
Generate Go structs, TypeScript interfaces, Rust structs, Python dataclasses, and more from JSON instantly.
What is JSON to Code Generator?
This tool automatically generates strongly-typed data structures from JSON. Paste your JSON, select your target language, and get instant struct definitions with proper type inference. Perfect for API integration, config parsing, or working with JSON APIs in statically-typed languages.
Supports 8 popular languages: Go structs with json tags, TypeScript interfaces, Rust serde structs with derive macros, Python dataclasses with type hints, Java records, Kotlin data classes, C# records, and Swift Codable structs.
Features
Smart type inference from JSON values (string, number, boolean, null, arrays, nested objects). Handles nested objects by generating separate named types. Supports nullable fields with language-appropriate syntax. Automatically adds serialization tags and attributes. Custom root struct naming. Snake_case to camelCase conversion where appropriate.
Supported Languages
Go: Generates structs with `json:"field"` tags, uses int64/float64 for numbers. TypeScript: Creates interfaces with optional fields for nullable values. Rust: Serde-compatible structs with derive macros and rename attributes. Python: Dataclasses with Optional[] type hints. Java: Modern record types. Kotlin: Data classes with nullable types. C#: Record types with nullable reference types. Swift: Codable structs with CodingKeys.