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T3 App Template

Online Compiler & IDE

The best way to start a full-stack, typesafe Next.js app.

The “T3 Stack” is a web development stack made by Theo focused on simplicity, modularity, and full-stack typesafety.

The core pieces are Next.js and TypeScript. Tailwind CSS is almost always included. If you’re doing anything resembling backend, tRPC, Prisma, and NextAuth.js are great additions too.

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The languages that make up the web. HTML provides the basic structure, CSS controls formatting, and JavaScript controls the behavior of different elements.
CPlusPlusC++ is a low-level and cross-platform imperative language. It has object-oriented, generic, and functional features.
C C is a general-purpose computer programming language. It's used in operating systems, device drivers, and protocol stacks.

Build anything with zero setup.

Instantly start and rapidly develop projects in any programming language or framework.
zero setup

Instantly host everything.

All your projects are instantly live. With zero setup deployment and custom domains, sharing your work with the world is easy.
host your projects instantly.

Create together, wherever.

Live collaboration is built-in. Create together with others from anywhere in the world, on any device.
multiplayer collaboration

Power up your projects.

Accelerate your coding with AI assistance. Boost your speed, storage, and memory. Keep your app running forever. Take your project to the next level.
power up your projects

Learn while you build.

Take step-by-step tutorials that teach you how to build your dream project, whatever it may be.
learning projects on Replit