Communicate locally.
Zero internet required.
Run the server on a single device. Everyone else connects instantly via their browser. Unlimited file sizes, complete privacy, zero configuration.
0
Latency100
% Private31
MB Size// Initialization sequence
Starting local server on port 3000...
Success: Server is running!
Local Network IP: 192.168.1.100:3000
Waiting for connections...
Built for speed and privacy
Everything you need for seamless internal team communication without relying on external servers.
Instant Messaging
Real-time WebSockets ensure messages are delivered instantly across all connected devices.
Unlimited File Size
Bypass email and cloud limits. Chunked uploads handle multi-gigabyte files flawlessly.
Fully Private
Your data never leaves your router. Air-gapped security by default. No analytics, no tracking.
Single Device Setup
Only the host runs the executable. Clients simply open a URL in any modern browser.
Cross-Platform
Works natively on macOS, Windows, Linux, iOS, and Android via the browser client.
Full Control
Senders retain the ability to permanently delete shared files from the local server.
Zero configuration required
Launch the Server
Double-click the standalone executable on the host machine. The server starts instantly, establishing a secure local endpoint.
Connect Devices
Colleagues open their browser and enter the local IP address displayed on the host terminal (e.g., 192.168.x.x).
Communicate
Drag and drop files, send rich text, and collaborate instantly with zero latency and absolute privacy.
Frequently asked questions
No. LAN Messenger operates entirely via your local network switch or router. External internet outages will not affect your ability to communicate or transfer files.
No. Only the host computer needs to run the lightweight executable. All other participants access the interface via their standard web browser.
There is no hardcoded software limit. Because transfers are processed locally using chunked WebSockets, you can theoretically send files as large as your local hard drive capacity permits.
Deploy local communication in seconds.
Open source. No registration. No tracking.
Download LAN Messenger