Developerstypescriptapiinterfaces

API Contract to TypeScript Types Generator

Translates raw JSON payloads or OpenAPI specifications into strict, well-documented TypeScript interfaces.

Use Case

When building frontend clients that need to integrate seamlessly and safely with backend REST APIs without manual type mapping.

AI Prompt

Act as an expert TypeScript architect. Convert the following JSON response payload or OpenAPI schema into complete, highly descriptive, and strictly typed TypeScript interfaces. Ensure that: 1. All optional fields are marked with a question mark. 2. Every interface and property has clean, standard inline documentation explaining its purpose. 3. Nested objects are extracted into their own named interfaces rather than inline declarations. 4. Union types or enums are used where variable string values are predictable. Here is the schema/JSON payload: [insert schema or JSON here]

How to Use

1Copy the prompt and identify your API schema.
2Paste your raw API JSON response or YAML/JSON OpenAPI definition into the placeholder.
3Generate and copy the resulting TypeScript interface file directly into your IDE.

Example Output

Here is your TypeScript definition file. Interface UserProfile contains nested Address interface. interface Address { street: string; city: string; postalCode: string; } interface UserProfile { id: string; email: string; phoneNumber?: string; address: Address; status: 'active' | 'inactive' | 'suspended'; }

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