NoMachine videos are recorded in the new NXR file format which uses the MKV format (Matroska), widely used and supported by the major video players which play NXR files without requiring transcoding. Any recordings available to NoMachine on the local desktop will show in the Machines tab of the Player. Double-clicking on an .nxr file will open the NoMachine Player.

Alternatively, playback of NoMachine recording files is also possible with, for example, Windows Media Player on Windows and with VLC for Windows, Linux and also macOS.

The exception is Apple's Quicktime for macOS. QuickTime doesn't support the MKV format. If using VLC is not an option, it's also possible to install the Perian plugin for Quicktime available at https://www.perian.org/.