Gerador Gratuito Online de JSON para TypeScript
Pare de escrever interfaces manualmente para respostas de API. Cole JSON e obtenha interfaces TypeScript com objetos aninhados divididos em tipos separados e formas de elementos de array inferidas automaticamente.
Nomeie a sua interface raiz, copie o resultado para o seu projeto e use-o com fetch ou o seu cliente HTTP para total segurança de tipo. Tudo é executado no lado do cliente no seu navegador.
Frequently Asked Questions
What TypeScript types are generated?
Primitive JSON values map to string, number, boolean, and null. Arrays become Type[] with the element type inferred from the first item. Objects become interfaces with named properties. Nested objects generate separate interface definitions.
How are optional fields handled?
Properties present in the sample JSON are included as required fields. If you need optional fields, add them to your sample JSON with null values, or manually add ? to the generated interface properties.
Can I name the root interface?
Yes. Set a custom root interface name before generating. Nested interfaces are named automatically based on property names (e.g., Address for an address object).
Does this handle union types?
The generator infers types from a single sample. If a field can be string or number, provide samples that include both variants, or manually adjust the generated type to a union (string | number).
Is the output compatible with strict TypeScript?
Yes. Generated interfaces use standard TypeScript syntax compatible with strict mode. Review nullable fields - JSON null maps to null in the type, not undefined. Adjust to field?: Type | null if needed.