✨ Now in Public Beta

Build apps instantly
in the browser

Prototype, deploy, and share full‑stack applications without leaving your browser. Zero config, zero wait — just code and ship.

🚀 Build Apps Now 📖 Read the docs

Popular playground templates

Click any card to explore — or hit Build Apps to start fresh.

⚛️

React + Vite Starter

Lightning-fast React app with HMR, TypeScript support, and optimized builds out of the box.

React Vite TypeScript
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🐍

Python Flask API

REST API boilerplate with Flask, automatic OpenAPI docs, and live-reload on every save.

Python Flask REST
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🟢

Node.js Express Server

Minimal Express server with middleware examples, environment variables, and hot reload.

Node.js Express JavaScript
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🧠

AI Chat Playground

Experiment with LLM APIs in a ready-to-run sandbox. Includes streaming and prompt templates.

AI/ML Streaming API
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🛢️

Full-Stack Postgres

Next.js app wired to a serverless Postgres database. Perfect for SaaS prototypes.

Next.js Postgres Prisma
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🦀

Rust WASM Sandbox

Compile Rust to WebAssembly directly in the browser and interact with JS bindings.

Rust WASM Web
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🔗 Go to Full Playground

All templates above will redirect you to playground.gitlawb.com/apps