zod
v4.3.6 MITTypeScript-first schema declaration and validation library with static type inference
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zod
About zod
Zod is a TypeScript-first schema declaration and validation library that excels at inferring static types from declarative schemas. Developers choose Zod to define complex data structures, validate runtime data against these schemas, and leverage TypeScript's type safety benefits without runtime overhead. Its core strength lies in its ability to create schemas that simultaneously serve as data validators and type definitions.
When to use
- When defining and validating API request/response payloads against TypeScript interfaces.
- When integrating with ORMs or databases that require schema definitions for data validation.
- When building forms in frontend applications and needing to validate user input against defined structures.
- When ensuring data consistency across different modules or services using a single source of truth for data shapes.
When NOT to use
- If your validation needs are limited to simple primitive checks — native JavaScript or TypeScript type annotations may suffice.
- If you require a validation library with a lower bundle size and minimal features — a more lightweight alternative might be more suitable.
- If your project predominantly relies on runtime introspection for validation and doesn't benefit from static type inference — a dynamic validation approach might be preferred.