JSON to TypeScript
Generate TypeScript interfaces from any JSON object automatically. Handles nested objects and arrays. Free, no signup.
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Frequently asked questions
- Arrays of objects?
- Merges keys from all elements into a single interface, emitted as ItemName[]. Mixed primitives become union types.
- Optional fields?
- Not detected. Current version assumes all keys required. Mark optional manually after generation.
- Nested interfaces?
- Yes. Each nested object becomes its own exported interface.