AVI Joiner is an easy-to-use tool to join AVI files into bigger one. Because the program does not recompress the avi files, the audio and video of the output avi file does not have any quality loss. And the conversion speed is extremely fast. It also supports to drag and drop files. Only the AVI files, which have same frame rate, frame size, video codec and audio parameters, can be joined. The program does not support DML AVI files.