JSON to TypeScript
Paste JSON and get matching TypeScript interfaces, with nested objects and arrays inferred automatically. Client-side only.
How it works
- 1
Paste your input
Type or paste your data into JSON to TypeScript.
- 2
Adjust options
Tweak the available settings — the output updates as you type.
- 3
Copy the result
Copy the output to your clipboard or download it as a file.
Common uses
- Generate TypeScript interfaces from a sample API response.
- Type a config object without writing interfaces by hand.
- Scaffold nested types from JSON for a new feature.
About the JSON to TypeScript
Paste JSON and get matching TypeScript interfaces, with nested objects and arrays inferred automatically. Client-side only.
JSON to TypeScript is part of a free, privacy-first toolkit. Everything is computed instantly on the client, so your data never leaves the page — useful when you're working with sensitive payloads.
Because json to typescript works without any sign-up or installation, you can use it as often as you like and it's always available — on desktop or mobile, and even offline.
Explore more developer tools, or try JSON Formatter · JSON Validator.
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JSON to TypeScript — FAQ
Yes. Nested objects become their own interfaces and arrays are typed from their first element, producing ready-to-use TypeScript.