Best for
- Frontend developers generating TypeScript interfaces from API payloads
- Typing REST/GraphQL JSON responses in Next.js/React
- Creating TypeScript models from raw sample data
Privacy
JSON is converted to TypeScript in your browser and is not sent to our servers for type generation.
Quick tips
- Ensure the JSON is valid before pasting to generate accurate, recursive type definitions.
- Nested objects and arrays are automatically extracted into separate named TypeScript interfaces.
- Supports optional fields and primitive unions (strings, numbers, booleans, null).
How to use this tool
- Paste a valid JSON object, array, or payload.
- Provide a name for the root interface (e.g. UserResponse, ProductData).
- Copy the generated TypeScript interfaces with full type safety.
Common questions
Does this tool support JSON Schema and nested objects?
Yes, it recursively creates typed interfaces for deeply nested JSON objects, array lists, and primitive properties.
Is my proprietary API schema safe?
Yes, 100% private. All type parsing and interface generation runs in your browser runtime without backend calls.
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