Abstract: One or more techniques and/or systems are disclosed for joining two or more devices in a multi-device communication session. A request is received from a first device, such as at a session hosting service on a remote server, to initiate a multi-device communication session, such on the session hosting service. A visual tag is sent to the first device, such as from the session service, where the visual tag comprises device-session pairing information, such as session service identification and session authorization. A multi-device communication session joining request is received from a second device, where the request from the second device comprises the device-session pairing information retrieved from the visual tag displayed by the first device, and captured by the second device.