Zod
TypeScript-first library for validating data at runtime and inferring static types from the same schema.
- Stars
- 44.2k
- Forks
- 2.3k
- Licence
- MIT
- Language
- TypeScript
- Last update
- 6 days ago
- Type
- Library
What it is
Zod is a TypeScript library for defining schemas that check whether data has the expected shape, such as form input or API responses. You describe the shape once, and Zod both validates values at runtime and gives you a TypeScript type that matches it. The README provided is truncated and only points to the package, so details beyond that are limited here.
- Validate form input before submitting it to a server
- Check the shape of JSON data from an external API
- Derive TypeScript types from a schema so the types and checks stay in sync
Great for
- TypeScript developers who want runtime checks that match their static types
- Teams validating API request or response data in TypeScript projects
- Developers who want one schema definition instead of separate types and validators
Not ideal for
- Projects not using TypeScript, since the library is described as TypeScript-first and the README excerpt gives no JavaScript-only guidance
- Readers needing a no-code tool, because this is a code library that requires writing schemas
How to get it
- 1
Install with a package manager
You'll need: Node.js · TypeScript
Clone the repository
git clone https://github.com/colinhacks/zod - 2
Run it
- Install the package with your package manager, following the project's README
- Define a schema describing the expected data shape
- Call the schema's parse or validation method on incoming data
- Use the inferred TypeScript type in your code
- 3
Get the most out of it
- Use inferred types so validation and TypeScript types stay in sync
- Reuse schemas across frontend and backend code where the data shape is shared
Downloads
Strengths
- Schemas produce both runtime validation and static type inference
- MIT licensed and widely starred (about 44k stars at time of metadata)
- Actively maintained, with a recent release (v4.6.7) and a recent push
Trade-offs
- The README excerpt was truncated, so API details and setup specifics could not be verified here
- Being TypeScript-first means its main value depends on using TypeScript
How it compares
| Project | Stars | Type | Level | Updated | Best for |
|---|---|---|---|---|---|
| zod (this) | 44.2k | Library | beginner | 6 days ago | TypeScript developers who want runtime checks that match their static types |
| yup | 23.7k | Library | beginner | 6 days ago | Developers validating form or API input in JavaScript or TypeScript |
| ts-pattern | 15.2k | Library | beginner | 23 days ago | TypeScript developers who write many if/else or switch branches over tagged unions |
Stats synced from GitHub. The assessment above was drafted with AI from the project's README on 2026-10-29 and may miss recent changes — check the README before relying on a command. MIT licence: free to use, modify and distribute, including commercially, as long as you keep the copyright notice.