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JSON to TypeScript Interface

Convert JSON data to TypeScript interfaces and type definitions. Automatically infer types, handle nested objects, and generate clean TypeScript code.

Component Not Available

The json-to-typescript tool component is not yet implemented in the component map.

How It Works

Privacy First

This json to typescript interface processes your data entirely in your browser. No data is uploaded to any server, ensuring complete privacy and security.

Lightning Fast

Instant processing with real-time validation and error detection. No waiting, no delays - just immediate results.

Versatile Use Cases

Converting API responses to TypeScript interfaces for type safety
Generating type definitions for configuration files and JSON schemas
Creating interfaces for database query results and data models

Mobile Friendly

Responsive design that works perfectly on all devices and screen sizes. Touch-friendly interface for mobile users.

Frequently Asked Questions

How does it handle arrays with different item types?

With "Infer Array Types" enabled, it creates union types like (string | number)[] for mixed arrays. It can also generate separate interfaces for object arrays.

What about optional properties?

Enable "Optional Properties" to mark properties with null/undefined values as optional (property?: type). This makes interfaces more flexible for incomplete data.

Can it handle deeply nested objects?

Yes, it automatically generates separate interfaces for nested objects and references them properly. Each nesting level gets its own interface definition.

How does it handle invalid property names?

Properties with spaces or special characters are automatically quoted ("property name": type). Enable camelCase conversion for cleaner property names.

What about null values and undefined?

Enable "Include Nullables" to preserve null types, or disable it to convert null values to "any" type for more permissive interfaces.