Zod
MIT TypeScript-first schema validation with static type inference
Libraries / Validation · OSS/MIT · 44.2k
Reviewed 2026-09-05 · last push 2026-10-19 · repo checked 2026-10-21
What's Good
MIT library. Parse unknown input to typed values. Composable objects, unions, transforms. De-facto standard across tRPC, forms, and API boundaries. Zero SaaS.
The Catch
TS schema plus static inference; library not SaaS. Bundle size matters at the edge. Not a form UI or API gateway.
Verdict
MIT TS schemas. Free library; you own the call sites.
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