JSON Schema to Zod Converter - Online Schema Transformation Tool

Online JSON Schema to Zod Converter

Migrate your validation logic seamlessly with our JSON Schema to Zod converter. As TypeScript developers move toward runtime validation, Zod has become the go-to library for schema declaration and type safety. This tool allows you to take your existing JSON Schemas and transform them into functional Zod code instantly, saving you from manual rewriting and ensuring consistency across your data models.

Why Convert JSON Schema to Zod?

While JSON Schema is excellent for cross-language data definition, Zod provides a developer-friendly, TypeScript-first way to validate data at runtime.

Unified Type Safety and Validation

By converting your JSON Schema to Zod, you gain the ability to infer TypeScript types directly from your validation logic. This eliminates the need to maintain separate interfaces and validation rules, reducing the risk of "type drift" in your application.

Better Developer Experience

Zod’s chainable API is much easier to read and maintain than raw JSON Schema. Our tool helps you bridge the gap, allowing you to keep using industry-standard JSON Schemas for documentation while using Zod for robust runtime checks in your codebase.

Key Features of the JSON Schema to Zod Tool

Our converter is built to handle complex schemas, ensuring that every constraint is accurately mapped to Zod's API.

1. Comprehensive Type Mapping

We support all core JSON Schema types and map them to their Zod equivalents:

• string, number, boolean → z.string(), z.number(), z.boolean()

• object → z.object({})

• array → z.array()

• enum → z.enum([]) or z.nativeEnum()

2. Logic & Constraint Support

The converter doesn't just map types; it also handles validation constraints:

• Strings: Supports minLength, maxLength, and pattern (Regex).

• Numbers: Supports minimum, maximum, and multipleOf.

• Objects: Correcty identifies required fields and marks others as .optional().

3. Support for Composition (Unions & Intersections)

Our tool accurately converts complex logic like anyOf, oneOf, and allOf into Zod's z.union() or z.intersection(), preserving the sophisticated validation rules of your original schema.

How to Convert Your Schema to Zod

1. Paste your JSON Schema: Enter your schema into the input editor.

2. Instant Conversion: The tool automatically generates the corresponding Zod schema code in real-time.

3. Refine (Optional): Give your schema variable a name (e.g., const userSchema = ...).

4. Copy and Implement: Copy the generated code and paste it directly into your TypeScript project.

Technical Insights: Handling Nullables and Optionals

One of the trickiest parts of schema migration is handling optionality.

• JSON Schema: A property is optional unless it appears in the required array.

• Zod: A property is required by default unless followed by .optional().

Our converter carefully analyzes the required property of your JSON objects to ensure that the generated Zod schema matches the exact behavior of your source file, preventing unexpected validation errors in your app.

Frequently Asked Questions (FAQ)

Is this tool compatible with Zod v3?

Yes, our converter generates code specifically optimized for the latest version of Zod (v3.x), utilizing the most modern and performant API methods.

Does it support JSON Schema Draft 2020-12?

We currently support Draft 4, 7, and the majority of features in 2019-09 and 2020-12. We are constantly updating our engine as the Zod ecosystem evolves.

Is my data secure?

Absolutely. All conversion logic is executed client-side in your browser. We never send your schema data to our servers, ensuring your proprietary data models remain private.