JSON 转 TypeScript
粘贴 JSON，即时获取带有嵌套类型的 TypeScript 接口或类型别名
How it works
- • Paste any valid JSON and get a TypeScript
interfaceortypealias. - • Nested objects become inline types. Arrays are inferred from the first element.
- • Change the root name to customize the top-level identifier.
- • Everything runs locally in your browser — no data is sent anywhere.
JSON to TypeScript Interface Generator
Paste any JSON object and instantly get a TypeScript interface or type alias with fully inferred types — nested objects, arrays, optional fields, and string literal unions. No manual typing needed.
How to convert JSON to TypeScript
- 1
Paste your JSON
Paste any valid JSON object or array into the input panel.
- 2
Choose output style
Select Interface (interface Foo {}) or Type Alias (type Foo = {}) based on your codebase style.
- 3
Copy the TypeScript
Click Copy and paste directly into your .ts or .tsx file.
FAQ
What is a TypeScript interface?
A TypeScript interface defines the shape of an object — the names and types of its properties. It's used to type-check objects at compile time without adding runtime overhead.
Should I use interface or type for JSON data?
Both work. Prefer interface for objects that may be extended later; use type for unions or when you need mapped types. For simple JSON models, interfaces are the standard choice.
Does it handle nested JSON?
Yes — nested objects generate nested interfaces, and arrays become typed arrays like string[] or UserAddress[].
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