JSON Schema to TypeScript Converter
Convert common JSON Schema structures into TypeScript interfaces or type aliases and review warnings for rules that do not map directly to TypeScript.
Paste a JSON Schema object. The TypeScript output is generated locally in your browser.
Options
This converter handles common schema patterns. Review warnings and test the generated code before using it in a production project.
TypeScript Output
Generated TypeScript will appear here.
Converting JSON Schema Into TypeScript Types
JSON Schema describes the shape of JSON data. TypeScript types help you work with that same data safely inside your code. When an API or config file already has a schema, converting it into TypeScript can save time and reduce mistakes.
This converter handles common objects, arrays, enums, required fields, nullable values, nested schemas, descriptions, and additional properties. It also reports warnings when a schema feature needs manual review.
Creating TypeScript From a Schema
- Paste your JSON Schema into the input box.
- Choose interface or type alias output.
- Pick property, array, export, and comment options.
- Convert the schema and review any warnings.
- Copy the generated TypeScript into your project.
Common JSON Schema to TypeScript Use Cases
- Generating interfaces from API request or response schemas.
- Creating config file types from JSON Schema.
- Turning generated schemas into developer-friendly types.
- Documenting schema fields with TypeScript comments.
- Creating starter types before editing them manually.
- Keeping API contracts and TypeScript code easier to compare.
Example TypeScript Output
export interface User {
id: number;
name: string;
email?: string;
tags: string[];
}Review Advanced Schemas Manually
JSON Schema can express many validation rules that do not map perfectly to TypeScript. Things like pattern, minimum, maximum, conditional schemas, dependent schemas, and complex refs may need manual review.
Use this converter as a practical starting point. For strict production contracts, review the output and adjust the types for how your real application uses the data.
Frequently Asked Questions
What does a JSON Schema to TypeScript converter do?
It reads JSON Schema and creates TypeScript interfaces or type aliases that match the schema structure.
Is this different from JSON to TypeScript?
Yes. JSON to TypeScript uses sample JSON. JSON Schema to TypeScript uses an existing schema with types, required fields, enums, and validation hints.
Does this support required fields?
Yes. Fields listed in required are generated as required TypeScript properties. Other fields are optional.
Does this fully support refs?
No. References are reported as warnings and converted to the selected fallback type so the output does not contain an undeclared name. Add local or external referenced declarations manually.
Is my schema uploaded anywhere?
No. Conversion happens directly in your browser.