Quick Answer
How do you convert JSON to a TypeScript interface?
// Answer
Take a representative JSON object and infer a type for each field: strings become string, numbers become number, arrays become typed arrays, and nested objects become their own named interfaces. This tool does that automatically so you can drop the result straight into your code.
Why use this tool
Type your API responses
Writing interfaces by hand for large API responses is tedious and error-prone. Paste a sample response and get accurate TypeScript types in seconds — all generated locally, so your data never leaves the browser.
FAQ
Frequently asked questions
They reflect the sample you paste. Provide a complete, representative object for best results, then refine optional fields manually.
Yes. Nested objects are extracted into their own named interfaces.
It infers types from the sample provided; mark fields optional manually where your data varies.
No, conversion is entirely in-browser.
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