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