lantransfer

Peer-to-peer file sharing over your local network. Zero dependencies. Works on Windows, macOS, and Linux.

npm install -g @balaji003/lantransfer
lantransfer

A browser window opens automatically — select a file, pick a nearby device, and send.

Features

• Zero dependencies — uses only Node.js built-in modules
• Auto-discovery — finds devices on your LAN automatically via HTTP subnet scanning (no firewall rules needed) + UDP broadcast fallback
• Browser UI — clean dark-themed interface, no extra apps to install
• Cross-platform — Windows, macOS, Linux
• Accept/Reject prompt — incoming files must be approved before transfer
• Progress tracking — real-time speed and progress for all transfers
• XOR encrypted — file data is obfuscated during transfer
• Native file picker — uses your OS file dialog (PowerShell on Windows, osascript on macOS, zenity/kdialog on Linux)

Usage

Install globally and run

npm install -g @balaji003/lantransfer
lantransfer

Or run directly with npx

npx @balaji003/lantransfer

Or clone and run

git clone https://github.com/user/lantransfer.git
cd lantransfer
node server.js

How it works

1. Run lantransfer on two (or more) devices connected to the same WiFi/LAN
2. Each device scans the local subnet to find other instances — no firewall configuration needed
3. Devices appear in the sidebar under "Nearby Devices"
4. Click Browse to select a file, select a device, and click Send
5. The receiver sees a popup to Accept or Reject
6. Accepted files are saved to the Downloads folder

Ports

| Port | Protocol | Purpose | |-------|----------|----------------------| | 3000 | HTTP | Web UI + discovery | | 34254 | UDP | Broadcast discovery (fallback) | | 34255 | TCP | File transfer |

Requirements

• Node.js >= 16.0.0
• Both devices on the same local network

License

MIT