🔄 TypeScript to Zod Schema Generator
Free online tool to convert TypeScript interfaces/type definitions to Zod validation schemas, supporting nested types, union types, and optional properties
Zero Dependencies · Works Offline📝 Input TypeScript Types
⚙️ Generation Options
📦 Zod Schema Output
// Paste TypeScript type definitions on the left to auto-generate Zod Schemas
What Can the TypeScript to Zod Schema Generator Do?
The TypeScript to Zod Schema Generator is an online tool for TypeScript developers that automatically converts TypeScript interface and type definitions into Zod validation Schemas. When you need runtime validation of external data (API responses, form inputs, etc.), this tool helps you quickly generate corresponding Zod validation code from existing TypeScript types, achieving end-to-end type safety.
Core Features
- Interface/Type Parsing: Supports both interface and type alias TypeScript definitions, auto-parsing property names, types, and modifiers
- Primitive Type Mapping: string→z.string(), number→z.number(), boolean→z.boolean(), null→z.null(), undefined→z.undefined()
- Advanced Type Support: optional→.optional(), union→z.union(), literal→z.literal(), array→z.array(), nested object→z.object()
- Flexible Naming: Schema suffix naming (UserSchema) or prefix naming (SchemaUser)
- Complete Imports: Auto-generates Zod import statements in named or namespace import style
How to Use
1. Paste your TypeScript interface or type definitions in the input box; 2. Select import style and Schema naming convention; 3. The tool auto-generates Zod Schema code in real-time; 4. Click "Copy" to copy the generated code; 5. Add it to your project and use z.infer
Use Cases
Case 1: API Response Validation
Validate API response data with Zod Schemas to ensure runtime data matches TypeScript type definitions, preventing unexpected backend data from causing runtime errors.
Case 2: Form Validation
Convert form TypeScript types to Zod Schemas for validation rules in libraries like React Hook Form, achieving type-safe form handling.
Case 3: Database Query Validation
Validate ORM query results with Zod Schemas after database operations to ensure data integrity during transmission and transformation.
Case 4: Configuration File Validation
Convert config file TypeScript types to Zod Schemas to validate environment variables and config files at application startup, catching configuration errors early.
Extended Knowledge
Zod is the most popular runtime validation library in the TypeScript ecosystem, created by Colin McDonnell. Its core advantage is "Schema as Type" — define a Zod Schema and automatically infer the corresponding TypeScript type via z.infer, eliminating the need to maintain two separate type definitions. Zod supports chainable APIs (e.g., z.string().min(1).max(100)), custom error messages, async validation, transform/pipe, and more. It's widely used in Next.js, tRPC, React Hook Form, and other major frameworks.
âť“ FAQ
What is Zod?
Zod is a TypeScript-first runtime data validation library providing type-safe Schema definitions and validation with automatic TypeScript type inference.
Why convert TypeScript types to Zod Schemas?
TypeScript types only exist at compile time. Zod Schemas provide runtime validation for end-to-end type safety with external data.
What TypeScript types are supported?
Supports interface, type aliases, primitives, arrays, nested objects, union types, optional properties, literal types, Record types, and more.
Can the generated Zod Schema be used directly?
Yes. Generated code follows Zod's official API conventions and works with z.infer
How are optional properties handled?
Optional properties (prop?: type) are automatically converted to Zod's .optional() chain method.
Is my data safe?
Completely safe. This tool runs 100% in the browser. Code is processed locally and never uploaded to any server.