JSON to Zod schema

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Paste JSON and generate a Zod v4 schema — nested objects, mixed arrays as unions, nullable fields, and optional toggles. Complements the JSON to TypeScript converter.

Your JSON never leaves the browser — no upload, no server.

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Options

Zod schema

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About this tool
Infers string, number, boolean, null, array, and object types from your JSON sample. Nested objects become nested z.object() calls. Mixed-type arrays become z.union(). Empty arrays use z.array(z.unknown()).
For TypeScript interfaces instead of runtime validation, use JSON to TypeScript.
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