Generate a Zod schema from JSON
Paste a JSON sample and get a Zod schema that validates it, plus the matching TypeScript type from z.infer. Nested objects get their own schemas.
How to use the JSON to Zod converter
- Paste JSON or drop a .json file on the editor.
- The Zod schema appears on the right as you type.
- Name the top-level schema, for example Order.
- Copy it, or download it as schema.ts.
What you get
- A named schema for every nested object
- Whole numbers as z.number().int()
- Optional keys as .optional(), nulls as .nullable()
- An exported type for each schema
About the JSON to Zod converter
Why validate
TypeScript types disappear at runtime. A Zod schema checks that data from an API, a form or an AI model really has the shape your code expects, and gives clear errors when it does not.
Ready to paste
The output imports z from zod and declares schemas in the right order, so it compiles as it is.
Frequently asked questions
- Which Zod version does the output target?
- The output uses the core API (z.object, z.array, z.union, z.infer) that works in Zod 3 and Zod 4.
- Can I make all fields required?
- Fields are optional only when some samples do not have them. Add the missing keys to your sample, or remove .optional() by hand.
- Is my JSON uploaded?
- No. The schema is generated in your browser.