Zod Schema Generator
Generate Zod validation schemas from JSON data. Supports nested objects, arrays, mixed types, optional fields, and .describe() annotations.
Input JSON
Zod Schema Output
Paste JSON on the left to generate a Zod schema
Zod Schema Generator
Generate Zod validation schemas from JSON data. Supports nested objects, arrays, mixed types, optional fields, and .describe() annotations.
Features
- Instant Zod schema generation from any valid JSON structure
- Handles nested objects, arrays, null values, and mixed types
- Options for optional fields, .describe() annotations, and export modifiers
- Generates z.infer type alias for full TypeScript integration
How to use
- Paste your JSON data or click Sample to load example data.
- Configure options: export, optional fields, .describe() annotations.
- Copy the generated Zod schema code to your clipboard.
Tips & Best Practices
- Paste your code directly or use the file upload feature for larger files.
- The tool preserves your original input — you can always go back and modify it.
- Use the output directly in your IDE or build pipeline.
- Check the formatted output for any warnings or validation messages.
- All processing is client-side, making it safe for proprietary code.
FAQ
What is Zod?
Zod is a TypeScript-first schema validation library. It lets you declare schemas for your data and validate inputs at runtime, ensuring type safety across your application.
Does it handle nested objects?
Yes. Nested objects are converted to nested z.object() calls, preserving the full structure of your JSON data in the generated schema.
How are arrays handled?
Arrays are wrapped in z.array() with the element type inferred from the first item. Empty arrays become z.array(z.unknown()) since the type cannot be determined.
What does the .describe() option do?
Adding .describe() annotates each field with its property name. This is useful for generating documentation, form labels, or error messages from your schema.
Is my data sent to a server?
No. All schema generation happens locally in your browser. Your JSON data never leaves your device, making it safe for proprietary or sensitive data.
Can I make all fields optional?
Yes. Toggle the 'All optional' checkbox to append .optional() to every field in the generated schema. This is useful for partial update or patch endpoints.