JSON to TypeScript Interface
Generate strictly-typed TypeScript interfaces, type aliases, and nested models from JSON.
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Code Generator
JSON to TypeScript Interface & Type Definition Generator
Speed up frontend development by auto-generating strong TypeScript interfaces and types directly from sample API JSON responses.
- 01
Recursive Nested Interfaces
Nested JSON objects are extracted into separate, cleanly named TypeScript interfaces (`export interface Team`).
- 02
Optional & Nullable Fields
Fields containing `null` or missing values are automatically typed as nullable (`string | null` or optional `field?: string`).
- 03
PascalCase Naming
Sanitizes JSON object keys into idiomatic TypeScript interface names.
Frequently Asked Questions
Answers about this tool.
Does this generator support optional fields and arrays?
Yes. Array objects generate array types (`Item[]`), and missing/null values generate optional or union types.
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