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JSON to TypeScript Converter — Generate Interfaces Instantly

Paste a JSON example to generate matching TypeScript interfaces instantly, with property types inferred directly from your data. For simple to moderately nested JSON this is the fastest path from API response to typed interface; for deeply nested structures with many sub-objects, Advanced JSON to TS gives more control over how nested types are named and organized.

How to use JSON to TS

1. Paste your JSON.
2. Review the generated TypeScript interface.
3. Copy it into your project.

Frequently asked questions

Are optional fields detected?

Fields present in your example are marked required by default; if some are actually optional, adjust the generated interface, since a single example cannot reveal which fields are sometimes absent.

How does it handle nested objects?

Nested objects generate their own named interface referenced from the parent — for very deep nesting with many objects, Advanced JSON to TS offers more control over naming.

Does it handle arrays correctly?

Yes — array fields generate the correct TypeScript array type based on the type of their elements.

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