64-bit
Windows
Windows 11 and 10 (64-bit)
Package:
Windows .exe installerVersion / Size:v1.3.3 · 46.8 MB
Open Source & LAN-firstv1.3.3
An open-source LAN messenger for instant, local-first team communication
Free and open-source instant messaging application for Windows, Mac, and Linux. Works seamlessly through your local network without internet or servers — secure, private, and lightning fast.
- No Server Required
- AES-256 & RSA Encryption
- Works 100% Offline
- Cross-Platform (Win / Mac / Linux)
Production Release v1.3.3
Release Notes v1.3.3Download LAN Messenger v1.3.3
Choose the installer for your local operating system. Official builds for Windows, macOS and Linux, published as GitHub release assets with SHA-256 checksums.
Apple Silicon
macOS (Apple Silicon)
Native ARM64 build for Apple Silicon (M-series) Macs
Package:
Mac .dmg (arm64)Version / Size:v1.3.3 · 42.7 MB
Intel x86_64
macOS (Intel)
Native build for Intel-based Macs
Package:
Mac .dmg (Intel x86_64)Version / Size:v1.3.3 · 42.5 MB
Debian / Ubuntu
Linux (.deb)
Ubuntu, Debian, Linux Mint, Pop!_OS and apt-based distros
Package:
Linux .debVersion / Size:v1.3.3 · 1.61 MB
Fedora / RHEL
Linux (.rpm)
Fedora, RedHat Enterprise Linux, CentOS, openSUSE
Package:
Linux .rpmVersion / Size:v1.3.3 · 3.05 MB
GPL-3.0
Source Code (C++ / Qt)
Audit cryptographic functions, compile for custom BSD or specialized OS
Repository:
lanmessenger/lanmessengerLicense:GNU General Public License v3.0
Previous releases
Looking for older production builds or 32-bit legacies? Archive assets remain preserved.
Comprehensive Feature Suite
The following are some of the features of LAN Messenger
Built for local networks without internet or central servers: offices, classrooms, labs and other isolated environments.
Instant Messaging
You can instantly connect with other users on the network and start a conversation.
Private Network
No need to worry about your privacy. Message traffic is encrypted with AES-256 and RSA-2048.
Broadcast messages
You will have the option to notify all users within the network or choose specific users.
Transfer Files
Forget about email attachments. This app makes it easy and hassle-free to transfer files to other users within the network.
Group Contacts
You can also easily organize people in your contact list. This will make it easy to find people when needed.
Log Messages
Previous conversations can also be archived, which you can access at any given time.
Works without Server
One of the best things about this instant messaging application is the lack of server that is required, making it less complicated.
Works without Internet Connection
This messaging application utilizes a local network, which means that you can send messages even without internet, which is beneficial in minimizing possible threats.
Cross-Platform & Multilingual
Native apps for Windows, macOS and Linux, with the interface in 20 languages.
Visual Interface
Native Desktop Window ManagerScreenshots across environments
Clean, native interfaces adapted for standard desktop themes across Windows, macOS Aqua, and Linux KDE/GNOME environments.
Windows ClientWindows Integration
System tray notifications, automatic startup option, and Windows firewall pre-configuration.
macOS UniversalmacOS Native Look
Native title bars, crisp typography, and separate builds for Apple Silicon and Intel.
Linux KDE / GNOMELinux Desktop Fit
Adapts to KDE and GNOME themes; ultra-light .deb and .rpm packages.
Full support for Apple Silicon arm64 & Intel x86_64 · click a preview to open the full screenshot
Open Source Collaboration
Need assistance or want to contribute?
Use GitHub for bug reports and general discussion. The codebase is C++ / Qt under GPL-3.0 — pull requests are welcome.
Get help, shape the roadmap
Found a bug on your subnet, or need help with deployment on RDS / Citrix? Open an issue — include your OS, app version, and network setup.
Specification
- EncryptionAES-256 + RSA-2048
- WAN DependencyNone (Zero WAN)
- Terminal ServicesRDS & Citrix Ready
- Current Version
v1.3.3