Developer Tool
JSON → Code Converter
Paste any JSON object and instantly generate typed code — Python dataclass, TypeScript interface, Go struct, Rust struct, C# class, or SQL CREATE TABLE. Stop writing boilerplate by hand.
Convert JSON to Typed Code
Target Language
JSON Input paste your JSON object
Generated Code TypeScript interface
Why This Saves You Hours
Every time you get a new JSON response from an API, you manually write a class or interface for it. This tool does that in one click — with correct types, optional fields, nested objects, and arrays handled automatically.
8 Languages
TypeScript, Python, Go, Rust, C#, Java, Kotlin, and SQL — all from the same JSON.
Nested Objects
Nested JSON objects become separate classes/structs automatically linked together.
Type Inference
Automatically detects string, number, boolean, array, null, and nested object types.
Instant
No server. Conversion runs locally in milliseconds. Works offline.
Frequently Asked Questions
Arrays are typed based on their first element. A JSON array of strings becomes
string[] in TypeScript, List[str] in Python, or []string in Go. Arrays of objects generate a nested type definition automatically.Yes. If your JSON starts with an array of objects, the tool uses the first object to infer the type structure and generates the appropriate list/array type wrapper in the target language.
The SQL output generates a
CREATE TABLE statement with appropriate column types — INTEGER for numbers, TEXT for strings, BOOLEAN for booleans. Nested objects are noted as separate table references. An auto-increment id column is added if not present.