JSON → TypeScript Interface
JSON → TypeScript: Automatically generate TypeScript interface or type from JSON data.
Standard: TypeScript 5.x
The JSON → TypeScript Interface Generator analyzes JSON data and automatically generates TypeScript interfaces or types. Convert API responses, config files, and more to types to boost development productivity. All processing happens in your browser; no data is sent to servers.
How to Use
- 1
Paste your JSON data into the input area.
- 2
Specify an interface name (optional).
- 3
Choose how to handle optional fields.
- 4
Copy the generated TypeScript interface/type or download it as a file.
Use Cases
API Type Generation
Automatically generate TypeScript types from REST API response JSON to ensure type safety.
Config File Types
Generate TypeScript types from config file JSON structures to leverage IDE autocomplete.
Boost Productivity
Save time manually writing types and reduce mistakes.
Documentation
Clearly document JSON data structures in TypeScript.
What is a TypeScript Interface?
A TypeScript interface is a type that defines the structure of an object.
Interfaces perform compile-time type checking to prevent runtime errors.
IDEs provide autocomplete, type hints, and more to improve the development experience.
This tool analyzes JSON structure and automatically infers appropriate TypeScript types.
Frequently Asked Questions (FAQ)
Q.Is my data safe?
A. Yes. All conversion happens in your browser. No data is sent or stored.
Q.What's the difference between Interface and Type?
A. Interfaces are extensible and support declaration merging. Types are more flexible and support union/intersection types.
Q.Are nested objects supported?
A. Yes, deeply nested object structures are automatically analyzed to generate types.
Q.How are arrays handled?
A. Array elements are analyzed to generate appropriate types (e.g., string[], number[], CustomType[]).
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