Which languages are supported for JSON type generation?

TypeScript (interfaces), Go (structs with json tags), Python (dataclasses), C# (classes with JsonProperty), and Java (POJOs with Jackson annotations) are all available.

How are nested JSON objects handled?

Each nested object level generates a separate named type or struct, following idiomatic naming conventions for each language.

Is my JSON data safe to paste?

Yes. All processing happens entirely in your browser. No JSON data is transmitted to any server.

Convert JSON to Typed Code Online

When integrating with an API or working with structured data, you need typed model classes and interfaces to get the benefits of your language's type system. Manually writing these from JSON payloads is tedious and error-prone for anything beyond a trivial schema. devtoolkit.sh provides converters for all major statically typed languages: TypeScript interfaces with optional field detection, Go structs with correct JSON tags, Python dataclasses with snake_case field names, and C# classes with JsonProperty attributes. All converters run in your browser — your JSON payloads never leave your device. Paste any JSON once and generate the type definitions for whichever languages your stack uses.

TSJSON to TypeScript

Convert JSON to TypeScript interfaces with proper type inference.

GoJSON to Go Struct

Convert JSON to Go struct definitions with json tags.

PyJSON to Python Class

Convert JSON to Python dataclasses with type hints.

C#JSON to C# Class

Convert JSON to C# classes with auto-implemented properties.

FAQ

Which languages are supported for JSON type generation?: TypeScript (interfaces), Go (structs with json tags), Python (dataclasses), C# (classes with JsonProperty), and Java (POJOs with Jackson annotations) are all available.
How are nested JSON objects handled?: Each nested object level generates a separate named type or struct, following idiomatic naming conventions for each language.
Is my JSON data safe to paste?: Yes. All processing happens entirely in your browser. No JSON data is transmitted to any server.