vite-env

What @t3-oss/env is for Next.js, but built natively on Vite 8 and Rolldown. Define your environment variables once with a schema, and get validated, typed imports everywhere.

Why I Built This

I wrote about the four problems with plain Vite environment variables — no validation, no type safety, string-only values, and easy server/client leaks. This plugin solves all four.

Key Features

• Typed virtual modules — import env with full IntelliSense
• Server/client split with build-time leak detection
• Zod v4 native validation with Standard Schema support (Valibot, ArkType)
• Auto .d.ts generation for type safety without manual declarations
• Platform presets for Vercel, Railway, Netlify
• HMR .env watching — changes reload without restart

Technical Details

The plugin generates virtual modules at build time, splitting server and client variables into separate imports. If client code accidentally imports a server variable, the build fails — preventing secret leaks before they happen.