Cross-sim multiplayer made simple
Cross-sim multiplayer
Fly together across different simulators in one shared session.
Peer-to-peer sessions
Efficient connections without relying on a mandatory central server.
Smooth formation flying
Stable, responsive positioning designed for close flying.
Shared cockpit
Multi-role crew experience with unlimited passengers.
Hub network
Discover public sessions and communities through Hubs.
Recorder & playback
Record aircraft traffic and replay it anytime.
JoinFS lets you fly together across different flight simulators in the same shared session. Connect MSFS 2020/2024, Prepar3D, X-plane and Microsoft Flight Simulator X pilots instantly, with smooth positioning for formation flying and group flights.
1
InstallDownload JoinFS and launch it.
2
ConnectJoin a Hub session or connect directly to friends.
3
FlySee other pilots in your simulator and fly together.
Download the latest version and start flying together today.
JoinFS: Cross-Sim Multiplayer & Shared Cockpit for Flight Simulation
JoinFS is a multiplayer networking client that helps flight sim pilots fly together in the same session—even when they use different simulators. If you’re looking for cross-sim multiplayer, formation flying, or a shared cockpit experience, JoinFS connects your group with a lightweight, pilot-focused approach.
Instead of relying on a mandatory central “mega server”, JoinFS uses efficient peer-to-peer sessions and a decentralized Hub network where you can discover public sessions, communities, and events—or keep things private when flying with friends. The result is quick setup, dependable connections, and stable positioning designed for close formation flying.
Supported simulators
Microsoft Flight Simulator 2024, Microsoft Flight Simulator 2020, Prepar3D, X-Plane, FSX: Steam Edition, and FSX (Windows downloads).
Key features for groups, events, and virtual airlines
- Cross-sim multiplayer: meet in one shared session across supported sims
- Shared cockpit: multi-role crew flying with passenger capability
- Formation flying: responsive aircraft movement built for close proximity
- Hub discovery: find public sessions and communities through Hubs
- Recorder & playback: record aircraft traffic and replay it for training or events
Whether you’re organizing a community fly-in, a virtual airline group flight, or a flight training session, JoinFS helps everyone stay connected and visible—so you can focus on flying, not troubleshooting.
Ready to get started? Visit the Download JoinFS page to choose your simulator version, or check the Support & FAQ for setup tips (ports, firewall, and troubleshooting).