JSON to TypeScript Converter
Paste any JSON and get clean TypeScript interfaces in return. Types, nested objects, and arrays are all inferred — no round trip to a server, no signup.
About this tool
Typing out interfaces for an API response by hand is busywork. Paste the JSON payload and get a starting set of interfaces you can drop into your codebase and refine. Everything runs locally in your browser, so your data never leaves the page.
How to use it
- 1Paste a JSON object into the input.
- 2Read the generated TypeScript interfaces on the right.
- 3Copy them into your project and adjust names or optionals as needed.
FAQs
Is my JSON sent to a server?
No. The conversion runs entirely in your browser — nothing is uploaded, so it's safe for sensitive payloads.
Does it handle nested objects and arrays?
Yes. Nested objects become their own interfaces and arrays are typed from their first element, giving you a solid starting point.
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