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JSON ↔ TypeScript Interfaces

LOCAL

Convert JSON into TypeScript Interfaces – and back.

Input

Output

What is JSON ↔ TypeScript Interfaces?

JSON to TypeScript Interfaces converts sample data into typed interface definitions and supports conversion in the opposite direction. It reduces repetitive model setup when an API example must become compile-time structure for a TypeScript application or a type definition needs a representative JSON shape.

How to use JSON ↔ TypeScript Interfaces

Paste JSON or TypeScript interface content, choose the conversion direction, and copy the generated representation.

When is JSON ↔ TypeScript Interfaces useful?

JSON ↔ TypeScript Interfaces is useful when modeling API responses, creating TypeScript types from sample data, or moving between typed and JSON-oriented workflows.

Example

A practical example is converting a sample API response into TypeScript interfaces before wiring it into a frontend.

Practical notes

Generated types reflect the sample, not the complete API contract. Review optional and nullable fields, arrays with mixed values, dates represented as strings, nested names, unions, and identifiers before importing the result into production code.

Continue this workflow

Recommended next steps for a typical data contract and conversion workflow.

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