JSON to TypeScript Interface & Type Generator
Paste any JSON API response or configuration object and generate clean, type-safe TypeScript interfaces or type aliases with automatic nested type extraction, optional field detection, and naming conventions.
How to Use JSON to TypeScript Interface Generator
Paste JSON Payload
Paste raw JSON data into the editor (invalid syntax is highlighted automatically).
Configure Type Options
Choose Interface vs Type Alias, set Root Interface name, and toggle optional properties.
Copy TypeScript
Copy the generated type-safe TypeScript code to your project.
About JSON to TypeScript Interface Generator
Typing complex REST or GraphQL API responses by hand takes hours. This converter analyzes JSON AST structures recursively to generate normalized, maintainable TypeScript models with zero runtime overhead.
Supported Formats
Key Features
- Recursive nested object extraction into separate named interfaces
- Handles primitive types (string, number, boolean, null, undefined)
- Array element type inference and union type resolution
- Options for 'interface' vs 'type', readonly properties, and optional fields (?)
- Instant copy and clean syntax formatting
Frequently Asked Questions
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