Generatore online gratuito da JSON a TypeScript
Interrompi le interfacce di scrittura a mano per le risposte API. Incolla JSON e ottieni le interfacce TypeScript con oggetti nidificati divisi in tipi separati e forme di elementi di array dedotte automaticamente.
Assegna un nome all'interfaccia root, copia l'output nel tuo progetto e utilizzalo con fetch o con il tuo client HTTP per la completa sicurezza dei tipi. Tutto viene eseguito lato client nel tuo browser.
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.