colinhacks/zod

Health v2 · maintenance only

Adoption not part of the score

44076 stars · 2240 forks observed · 2026-10-10

What it is AI-extracted, prompt v1, taxonomy v1, 2026-09-28, confidence 0.98

Zod is a TypeScript‑first schema validation library that provides runtime validation with static type inference. It lets you define schemas and parse data safely, returning fully typed results.

Use cases

• validate user input in a TypeScript web application
• ensure API request payloads match a defined schema
• type‑safe parsing of JSON configuration files
• runtime validation of environment variables
• generate JSON Schema from TypeScript types for external tools

When to choose

• You need zero external dependencies and a tiny bundle size.
• You want static type inference that matches runtime validation.
• Your project is written in TypeScript or modern JavaScript and runs in Node.js or browsers.
• You prefer an immutable, chainable API for building schemas.

When to avoid

• You require a validation library with built‑in support for complex custom error codes or internationalization.
• Your codebase is not TypeScript and you cannot benefit from static type inference.
• You need deep integration with non‑JS ecosystems (e.g., Python, Java) without a JS bridge.

Facets

library · maturity active

parser form-handling serialization web-development backend data-science browser typescript-first zero-dependencies immutable-api static-type-inference tiny-bundle nodejs deno

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