Zod Schema Generator
Generate Zod validation schemas from JSON data. Supports nested objects, arrays, mixed types, optional fields, and .describe() annotations.
Indata JSON
Zod Schema Utdata
Klistra in JSON på the left till generate en Zod schema
Zod Schema Generator
Generate Zod validation schemas from JSON data. Supports nested objects, arrays, mixed types, optional fields, and .describe() annotations.
Funktioner
- Generate Zod TypeScript schemas from a JSON sample
- Type inference: string / number / boolean / null / array / nested object
- Optional fields when allOptional is enabled
- Output is a ready-to-paste z.object({...}) schema with import line
- Deeply nested objects work, though complex unions and refinements may need manual tweaks
Så använder du
- Klistra in din JSON data eller klicka Sample till load exempel data.
- Configure alternativ: export, valfri fields, .describe() annotations.
- Copy the generated Zod schema kod till din urklipp.
Tips och bästa praxis
- Provide a representative sample — the generator infers each field from the first non-null value it sees.
- For union types (string | number), the generator picks the first type and you'll need to widen with z.union manually.
- Date strings are inferred as z.string() — switch to z.string().datetime() if you want format validation.
- For very nested shapes, generate per-piece schemas and compose with .merge() — easier to maintain than one mega-object.
- Pair with z.infer<typeof schema> in your TypeScript code for free types from the schema.
Vanliga frågor
What is Zod?
Zod is a TypeScript-first schema validation library. It lets you declare schemas for your data and validate inputs at runtime, ensuring type safety across your application.
Does it handle nested objects?
Yes. Nested objects are converted to nested z.object() calls, preserving the full structure of your JSON data in the generated schema.
How are arrays handled?
Arrays are wrapped in z.array() with the element type inferred from the first item. Empty arrays become z.array(z.unknown()) since the type cannot be determined.
What does the .describe() option do?
Adding .describe() annotates each field with its property name. This is useful for generating documentation, form labels, or error messages from your schema.
Is my data sent to a server?
No. All schema generation happens locally in your browser. Your JSON data never leaves your device, making it safe for proprietary or sensitive data.
Can I make all fields optional?
Yes. Toggle the 'All optional' checkbox to append .optional() to every field in the generated schema. This is useful for partial update or patch endpoints.