# Create T3 App — Full-Stack Typesafe Next.js Starter

> Create T3 App is the fastest way to scaffold a full-stack, typesafe Next.js application using the T3 Stack: Next.js, TypeScript, tRPC, Prisma, Tailwind CSS, and NextAuth.js.

## Install

Save in your project root:

# Create T3 App — Full-Stack Typesafe Next.js Starter

## Quick Use
```bash
npm create t3-app@latest
cd my-t3-app
npm run dev
```

## Introduction
Create T3 App is a CLI tool that scaffolds a production-ready Next.js project with a carefully curated set of libraries known as the T3 Stack. The stack prioritizes end-to-end type safety, combining tRPC for API calls, Prisma for database access, and TypeScript throughout. It lets you start building features immediately with sensible defaults.

## What Create T3 App Does
- Scaffolds a Next.js project with interactive prompts to select your preferred stack components
- Configures tRPC for type-safe API routes with automatic client-server type inference
- Sets up Prisma ORM with a ready-to-use schema and database connection
- Integrates NextAuth.js for authentication with providers like GitHub, Google, and Discord
- Applies Tailwind CSS with PostCSS configuration and a base utility setup

## Architecture Overview
The T3 Stack uses Next.js as the application framework with TypeScript everywhere. tRPC creates a type-safe bridge between the client and server: you define procedures on the server and call them from the client with full autocompletion and type checking, no code generation needed. Prisma provides the database layer with a typed client generated from your schema. NextAuth.js handles sessions and OAuth flows. All pieces share TypeScript types, so a change in the database schema propagates type errors through the API layer to the UI.

## Self-Hosting & Configuration
- Run `npm create t3-app@latest` and follow prompts to select tRPC, Prisma, NextAuth, and Tailwind
- Configure the database connection string in `.env` (supports PostgreSQL, MySQL, SQLite via Prisma)
- Edit `prisma/schema.prisma` to define your data models, then run `npx prisma db push`
- Add tRPC routers in `src/server/api/routers/` and register them in `src/server/api/root.ts`
- Deploy to Vercel, Railway, or any Node.js host; set environment variables for database and auth providers

## Key Features
- End-to-end type safety from database schema through API layer to React components
- Interactive CLI with modular opt-in for each stack piece (skip what you do not need)
- Zero code generation for API types: tRPC infers types directly from server procedure definitions
- Preconfigured ESLint, TypeScript strict mode, and path aliases for clean project structure
- Active community with extensive documentation, tutorials, and example projects

## Comparison with Similar Tools
- **create-next-app** — official Next.js scaffolder with minimal setup; T3 adds tRPC, Prisma, and auth
- **Blitz.js** — full-stack Next.js framework with its own RPC layer; T3 uses standard tRPC and is less opinionated
- **RedwoodJS** — React + GraphQL full-stack framework; T3 uses tRPC instead of GraphQL for simpler type inference
- **SvelteKit** — Svelte full-stack framework; T3 is React/Next.js-specific with TypeScript-first tooling
- **Wasp** — DSL-driven full-stack framework; T3 stays closer to standard Next.js patterns

## FAQ
**Q: Do I have to use all T3 Stack components?**
A: No. The CLI lets you opt in or out of each library. You can scaffold a project with just Next.js and Tailwind if you prefer.

**Q: What databases work with the T3 Stack?**
A: Any database Prisma supports, including PostgreSQL, MySQL, SQLite, CockroachDB, and MongoDB.

**Q: Is tRPC hard to learn?**
A: tRPC is straightforward if you know TypeScript. You define server functions and call them from the client with full type inference, no schemas or code generation required.

**Q: Can I add GraphQL instead of tRPC?**
A: Yes. The scaffolded project is a standard Next.js app, so you can replace or supplement tRPC with any API approach.

## Sources
- https://github.com/t3-oss/create-t3-app
- https://create.t3.gg/

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Source: https://tokrepo.com/en/workflows/6c6129a4-3fb6-11f1-9bc6-00163e2b0d79
Author: AI Open Source