JSON to Zod

Generate Zod schemas from sample JSON. Free, private, runs in your browser.

100% private — your files and text never leave your browser. All processing happens locally on your device.

Input JSON

Generator Settings

Root name

Nulls

Export schemaEmit inferred type

Paste JSON above to generate code.

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Generate Zod From Sample JSON

JSON to Zod infers a TypeScript Zod schema from sample data, including nested objects, arrays, nulls, and property names that need quoting inside object shapes.

Nullable Strategy Controls

Choose how sample null values should be represented so generated schemas match your validation style. The output can include an exported schema and an inferred TypeScript type.

Review Inference Boundaries

A sample cannot prove every optional field or union branch. Treat generated Zod as a strong starting point, then adjust it for real API contracts before shipping.

FAQ

Does JSON to Zod infer from one sample?

Yes. It generates a practical schema from the JSON you provide. Review optional and union fields when one sample cannot show every shape.

How are invalid property names handled?

Keys that are not valid TypeScript identifiers are quoted in the generated z.object shape.

Can null values be nullable or nullish?

Yes. Choose the null strategy to shape how generated Zod fields handle null-like values.

Is my JSON uploaded?

No. The sample is parsed and converted locally in your browser.

Can I export the code?

Yes. Copy the TypeScript output or download a .ts file.