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T3 Stack · Concept

Zod

T3 Env supports any validator that implements Standard Schema v1. This lets you validate server and client environment variables with libraries such as Zod, Valibot, or ArkType.

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Syntax

createEnv({ server, clientPrefix, client, runtimeEnv, extends? })

In-depth API docs are only for subscribers: parameters, examples, common mistakes and interview practice.

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  • Standard Schema
  • Zod
  • Valibot
  • ArkType
  • createEnv
  • presets-zod
  • presets-valibot
  • presets-arktype

Source: Standard Schema. Checked 2026-11-03.