Paste JSON, get typed code —TypeScript, Go, Python, Java. Stop hand-writing interface definitions from API responses.
When integrating a new REST API, the most tedious step is writing type definitions from a sample response. This tool reads the JSON structure and infers the correct types for each field —avoiding the error-prone manual process.
Type inference rules: JSON strings →string, numbers →number / float64 / int (int if whole number), booleans →boolean / bool, arrays →typed lists, null →optional/union with null. Nested objects generate nested types.
See also: JSON Formatter · JSON Schema Validator · JSON →CSV