JSON 转 TypeScript
从 JSON 生成 TS 接口与类型
JSON 输入
TypeScript 输出
Generate exact TypeScript types from real payloads
Hand-typing interfaces from an API response is error-prone — you forget a field, get a type wrong, miss a nested array. Generating TypeScript directly from a sample payload produces named interfaces, typed arrays, and nested types that match the data exactly, ready to paste into your code.
Use the converter when you need to
Type a new API response
Drop a sample response in, get back interfaces you can import without writing a single property by hand.
Catch shape changes during integration
Regenerate types when the API response shape evolves and let TypeScript surface every downstream break.
Type third-party SDK responses without docs
When an SDK lacks types, generate them from a real response and gain autocomplete instantly.
How to generate TypeScript from JSON
- 1
Paste a sample JSON document into the editor.
- 2
Optionally rename the root type to match your domain.
- 3
Copy the generated interfaces into your codebase or a shared types package.
Keep going
Generate types in other languages
Produce Python, Java, Go, C#, Kotlin, Rust, or Swift types from the same JSON sample.
Generate a JSON Schema
Create a runtime contract you can validate against, in addition to compile-time types.
Mock data for these types
Generate matching fake data to build UI before the real backend exists.
Format the source first
Clean up the sample payload so the generated type names follow consistent casing.
Common JSON-to-TypeScript workflows
Generate interfaces from one real response and use them across every fetch call in your app.
Drop a sample webhook event in and get types your handler can import on day one.
Generate interfaces for structured AI output so the compiler flags missing or renamed fields.
相关工具
常见问题
把一个 JSON 对象粘贴进来，工具会分析它的结构、数据类型和嵌套关系，自动生成 TypeScript interface。数组会根据元素内容推断类型，嵌套对象会拆成单独命名的 interface。
生成结果以你提供的样例数据为准：样例里出现的字段会被当作必填。哪些字段是可选的需要你在检查生成类型后，手动加上 ? 修饰符。
可以，这也是最常见的用法之一。把 JSON API 响应复制过来粘贴，就能得到可直接用于前端代码的 TypeScript interfaces，尤其在对接 REST API 时能省很多时间。
string → string，number → number，boolean → boolean，null → null；数组会生成带元素类型的数组（例如 string[]）；对象会生成带属性的命名 interface。