📘TypeScript to JSON Schema

Convert TypeScript interfaces to JSON Schema definitions.

TypeScript Interfaces

JSON Schema Output

About TypeScript to JSON Schema

Convert TypeScript interfaces and type definitions into JSON Schema format. Paste a TypeScript interface and get a valid JSON Schema that describes the same data structure, including property types, required fields, and nested objects. Useful for API validation, form generation, and documentation.

How to Use TypeScript to JSON Schema

1
Paste your TypeScript
Enter a TypeScript interface or type definition in the input area.
2
Convert
Click Convert to generate the equivalent JSON Schema definition.
3
Copy the schema
Copy the JSON Schema for use in API validation, documentation, or form generation.

Common Use Cases

Generating API request validation schemas from TypeScript types
Creating JSON Schema for OpenAPI/Swagger documentation
Building form validation rules from TypeScript interfaces
Sharing data structure definitions with non-TypeScript teams

Frequently Asked Questions

What TypeScript features are supported?

The converter handles interfaces with string, number, boolean, array, and nested object types. Optional properties (marked with ?) are correctly reflected in the JSON Schema required array.

What is JSON Schema used for?

JSON Schema is a standard for describing JSON data structures. It is used for API request/response validation, form generation, documentation, and ensuring data conforms to expected formats.

Can it handle complex TypeScript types?

The tool handles common interface patterns. Advanced TypeScript features like generics, union types, and mapped types may require manual adjustment in the generated schema.