Typesafe Envs made Simple

This is the framework agnostic core package of t3-env.

For full documentation, see https://env.t3.gg

Installation

1# npm
2npm i @t3-oss/env-core
3
4# pnpm
5pnpm add @t3-oss/env-core
6
7# bun
8bun add @t3-oss/env-core
9
10# deno
11deno add jsr:@t3-oss/env-core

Usage

[!NOTE]

You may use any Standard Schema compliant validator of your choice. This example uses Zod

1// src/env.ts
2import { createEnv } from "@t3-oss/env-core";
3import { z } from "zod";
4
5export const env = createEnv({
6  /*
7   * Serverside Environment variables, not available on the client.
8   * Will throw if you access these variables on the client.
9   */
10  server: {
11    DATABASE_URL: z.string().url(),
12    OPEN_AI_API_KEY: z.string().min(1),
13  },
14  /*
15   * Environment variables available on the client (and server).
16   *
17   * 💡 You'll get type errors if these are not prefixed with PUBLIC_.
18   */
19  clientPrefix: 'PUBLIC_',
20  client: {
21    PUBLIC_CLERK_PUBLISHABLE_KEY: z.string().min(1),
22  },
23  /*
24   * Specify what values should be validated by your schemas above.
25   */
26  runtimeEnv: process.env,
27});