Toolkit / Developer Tools

JSON to TypeScript Interface

Generate TypeScript interfaces from a JSON example to speed up API typing and frontend model creation.

Works in browserFast page

Privacy note: Developer inputs are handled locally for supported tools. Avoid pasting production secrets, private keys, or credentials into any tool unless you understand the risk.

Limitations: Inferred types are only as accurate as the sample JSON you provide.

JSON to TypeScript Interface

Infer TypeScript types from JSON examples in the browser.

Generated TypeScript

export type ToolkitResponseToolsItem = {
  "slug": string;
  "category": string;
};

export type ToolkitResponse = {
  "name": string;
  "tools": Array<ToolkitResponseToolsItem>;
  "count": number;
};

export type ToolkitResponse = ToolkitResponse;

Inferred types are based on the sample JSON you provide. Review optional fields and unions before using in production.

How json to typescript interface works

Paste a representative JSON sample, choose a root type name, and copy the generated TypeScript.

The generated types are inferred from the values in your sample.

Privacy

Developer inputs are handled locally for supported tools. Avoid pasting production secrets, private keys, or credentials into any tool unless you understand the risk.

Limitations

  • Inferred types are only as accurate as the sample JSON you provide.
  • Optional fields, nullable values, and mixed arrays may need manual cleanup.
  • Generated types should be reviewed before adding them to production code.

FAQs

Can this infer optional fields?

It can infer from the sample, but fields missing from the sample cannot be discovered automatically.

What root type name should I use?

Use a clear PascalCase name such as UserResponse, Invoice, or ProductList.

Does this create runtime validation?

No. It generates TypeScript types, not runtime validators.

Should I edit the generated type?

Yes. Review unions, null values, arrays, and optional fields before using it in your project.