zippydevtoolsJSON
JSON to TypeScript
Generate TypeScript interfaces and types from valid JSON samples in the browser.
Process the input to see the result here.
Generate TypeScript interfaces and types from valid JSON samples in the browser.
Standard tool execution runs in the browser, with no dedicated backend for processing inputs.
- Paste or enter data in the input panel.
- Use Process, or let automatic processing run when available.
- Review the result, copy the output, and validate it before critical use.
- Infer a response type
Infer a response type
Input: {"user":{"id":1,"name":"Ana"}}
Output: TypeScript interfaces or types based on the sample.
Does output exactly match my API contract?
Not always. Types are inferred from the JSON sample you provide.
Can I choose interface or type output?
Yes. You can generate either interface or type output style.
Is the root type name normalized?
Yes. It is normalized to PascalCase and gets a T prefix if it starts with a number.
Are optional fields inferred automatically?
Yes. Missing keys across array object samples can become optional properties.
Does it validate JSON Schema?
No. It performs type inference from sample data, not formal schema validation.