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Zod Schema Generator

Convert a JSON sample or TypeScript interface into a production-ready Zod schema in seconds. Smart field-name inference automatically picks z.email(), z.url(), z.uuid() and more — so you get tight validation, not just z.string() everywhere.

  • JSON → Zod
  • TypeScript → Zod
  • Live JSON Validator
  • React Hook Form output
  • Next.js API Route output
  • Server Action output
  • Smart field-name inference
  • No signup needed

Paste a JSON object. Field names and values are both used to infer the right Zod validators.

Smart inference rules

When using the JSON mode, the generator reads both the field name and the value to pick the most specific Zod validator automatically.

Field name patternGenerated type
email / *emailz.email()
url / website / image / avatar / srcz.url()
uuid / guid + UUID valuez.uuid()
password / token / secretz.string().min(8)
ISO datetime valuez.string().datetime()
ISO date value e.g. 2025-06-13z.string().date()
time value e.g. 10:30:00z.string().time()
age / year / count / *limitz.number().int().nonnegative()
price / amount / cost / feez.number().nonnegative()
percentage / rate / ratioz.number().min(0).max(100)
*id (positive integer value)z.number().int().positive()

What is this Zod Schema Generator?

This free online tool converts raw JSON objects or TypeScript interfaces into valid, modern Zod schemas instantly — right in your browser, with zero dependencies installed. It uses only non-deprecated Zod v3 APIs so the output drops straight into any project using Zod 3.x.

What makes this generator different?

Most Zod generators treat every string as z.string() and every number as z.number(). This tool does more:

  • Smart field-name inference — fields named email, url, uuid, price, age, count, etc. automatically get the tightest validator.
  • Value-pattern detection — even if the key is generic, an email-shaped value still produces z.email().
  • Live JSON Validator — paste any JSON and validate it against your generated schema in real time, seeing per-field error messages directly on the page.
  • Ready-to-use output tabs — get React Hook Form + zodResolver boilerplate, a Next.js API Route handler, and a Next.js Server Action in one click.
  • TypeScript → Zod — parses interfaces including unions, enums, optional fields, generics (Partial<T>, Record<K,V>, etc.), and nested objects.

How to use the Zod Schema Generator

  1. Pick JSON Sample or TypeScript Interface as your input mode.
  2. Paste your data and optionally set a schema name.
  3. Toggle Strict to reject unknown keys, or All optional to make every field optional.
  4. Click Generate Zod Schema.
  5. Switch between the output tabs — Zod Schema, React Hook Form, Next.js API Route, and Server Action — and copy the code you need.
  6. Use the Live Validator tab to instantly test any JSON against your schema.

Why use Zod for validation?

Zod is the de-facto standard for runtime type validation in the TypeScript ecosystem. It pairs perfectly with Next.js Server Actions, tRPC, React Hook Form, and any REST or GraphQL API layer. By generating schemas instead of writing them by hand you save time, avoid typos, and keep your runtime validation in sync with your TypeScript types automatically via z.infer<typeof schema>.