JSON to Zod Schema
Generate Zod validation schemas from a JSON object
About JSON to Zod Schema
Turns a JSON sample into a Zod schema exported as RootSchema, together with a Root type derived through z.infer. Every number maps to z.number(), a null value to z.null(), and empty arrays or objects to z.array(z.unknown()) and z.record(z.string(), z.unknown()). Your JSON carries over when you switch to another language in the selector, and nothing is sent to a server.
Category: Converters.
Frequently asked questions
What is Zod?
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Zod is a TypeScript-first schema validation library. It lets you declare the shape of your data and validate it at runtime while inferring the static TypeScript types automatically.
Does the converter handle nested objects?
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Yes. Nested JSON objects become nested z.object() calls, and arrays become z.array() with the inferred element type.
How do I use the generated schema?
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Install zod (npm i zod), paste the output into your project, then call RootSchema.parse(data) to validate and type your data in one step.
Are optional fields supported?
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Not automatically. The schema comes from a single sample, so every key is required and a null value becomes z.null(). Add .optional() to keys that can be missing and replace z.null() with something like z.string().nullable() where a value can be null.