Does it handle nested objects?

Yes, nested objects automatically generate separate interfaces with appropriate names based on the property key.

How are arrays typed?

Arrays are typed based on their element types. Mixed arrays become union types (e.g., (string | number)[]).

Does it support optional properties?

Yes, enable the Optional props checkbox to add ? to all properties, making them optional in the interface.

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JSON to TypeScript

Convert JSON data to TypeScript interfaces automatically. Handles nested objects and arrays.

JSON Input

TypeScript Output

Root Name

Optional props
Export

About

This tool automatically generates TypeScript interfaces from JSON data. It correctly infers types for strings, numbers, booleans, null, arrays, and nested objects. Nested objects get their own named interfaces. Arrays are typed based on their contents.

JSON to TypeScript

About

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