TypeScript-first schema validation with static type inference.
Zod is a schema declaration and validation library. Define a schema once and get both runtime validation and a static TypeScript type from it. Commonly used to validate API input, environment variables, and form data.
Petr Novák
Backend developer
Great DX, but on the billing service we hit real CPU cost validating large, deeply-nested payloads on hot paths. Fine for boundaries and config; for high-throughput internal traffic we moved the hottest schemas to hand-written guards. Recommend with that caveat.
Internal billing service · 2026-05-02
David Stráňava
Full-stack developer
Used Zod end-to-end on Acme CRM — request validation, env parsing, and shared form schemas between the Nuxt frontend and the API. Inferring types from the schema killed a whole class of drift bugs. Would reach for it again by default.
Acme CRM · 2026-03-12