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JSON to TypeScript Interface Converter
Generate strongly-typed TypeScript interfaces from raw JSON payloads automatically.
Input JSON
TypeScript Interfaces
What is JSON to TypeScript Converter?
TypeScript introduces static typing to JavaScript. In modern web development, API responses return standard JSON. To map these responses safely inside a frontend codebase, developers write Type interfaces. Manually declaring interfaces for deeply nested objects is slow and error-prone. This converter automates the process instantly.
Features of Fawru JSON to TS Converter
- Nested Parsing: Automatically extracts child structures and builds standalone nested sub-interfaces.
- Array Detection: Identifies array element type mappings and supports union types (e.g. `(string | number)[]`).
- Type Safety: Handles boolean values, number types, and detects nullables cleanly.
- Configurable Naming: Customize the root interface class name.
How to Convert JSON to TypeScript Interfaces
- Paste your sample JSON payload into the input editor.
- Define your root class model name (defaults to `Root`).
- Click Convert to TypeScript. The tool will parse structure mappings immediately.
- Copy or download your interface definitions code.