PeerDrop

Privacy-first peer-to-peer file transfer using WebRTC

Features

• 🔒 Privacy-First: Files never touch the server, direct peer-to-peer transfer
• ⚡ Fast: Achieves 80%+ of available bandwidth between peers
• 🌍 Cross-Platform: Works on any device with a modern browser
• 🎯 Simple: No sign-up, no installation, just share a room code
• 🔐 Secure: WebRTC encryption (DTLS) enabled by default
• 📱 Responsive: Optimized for mobile, tablet, and desktop

Quick Start

Prerequisites

• Node.js 18+
• pnpm 8+

Installation

# Install dependencies
pnpm install

# Start development servers (frontend + signaling server)
pnpm dev

# Build for production
pnpm build

Development

# Run all tests
pnpm test

# Type checking
pnpm typecheck

# Linting
pnpm lint

Project Structure

2-peerdrop/
├── packages/
│   ├── frontend/          # React SPA (Vite)
│   └── signaling-server/  # Node.js WebSocket server
├── package.json           # Monorepo root
└── pnpm-workspace.yaml    # Workspace configuration

How It Works

1. Sender creates a room and receives a unique 6-character code
2. Receiver joins using the room code
3. WebRTC connection established via signaling server
4. Files transferred directly between browsers (P2P)
5. No data stored on server

Architecture

• Frontend: React 18, TypeScript, Vite, Tailwind CSS, Zustand
• Signaling: Node.js, Express, Socket.IO
• P2P Transfer: WebRTC (RTCDataChannel)
• Deployment: Vercel (frontend) + Railway (signaling server)

Compliance

• ✅ No server-side file storage (ephemeral processing only)
• ✅ WCAG 2.2 AA accessibility compliant
• ✅ GDPR principles (data minimization, zero PII)
• ✅ WebRTC encryption (DTLS) by default
• ✅ 24-hour room expiration

License

MIT

Acknowledgments

• Built with WebRTC
• Powered by Socket.IO