Is my JSON data uploaded to a server?

No. The conversion runs entirely in your browser with JavaScript. Nothing is sent over the network, which makes the tool safe for sensitive data.

Which Zod version is the generated code for?

The tool targets Zod v4. Integers are typed with z.int() and floating-point numbers with z.number(), so you get the most precise validation out of the box.

How are nested objects handled?

Each nested object becomes its own const schema. Child schemas are declared before their parents, so the generated code is executable as is.

JSON to Zod Schema Converter — Free Online Tool

Generate Zod v4 schemas from sample JSON instantly in your browser. Free, private and offline-friendly: your data never leaves your device.

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Root name

JSON input

Zod output

Why convert JSON to Zod?

Writing Zod schemas by hand for every API payload is slow and error-prone. Paste a sample JSON document above and get a ready-to-use Zod v4 schema in milliseconds, with one const schema per nested object.

How it works

The converter parses your JSON locally and builds z.object schemas for every object it finds. Integers become z.int(), floats become z.number(), and heterogeneous arrays are typed with z.union. Nested schemas are declared children-first, so you can copy the output straight into your project and run it.

Frequently asked questions

Is my JSON data uploaded to a server?: No. The conversion runs entirely in your browser with JavaScript. Nothing is sent over the network, which makes the tool safe for sensitive data.
Which Zod version is the generated code for?: The tool targets Zod v4. Integers are typed with z.int() and floating-point numbers with z.number(), so you get the most precise validation out of the box.
How are nested objects handled?: Each nested object becomes its own const schema. Child schemas are declared before their parents, so the generated code is executable as is.