Convert XKR to MP4

Converting Sing Magic Karaoke Song Format directly to MPEG-4 Videos (.xkr to .mp4 conversion) doesn't seem possible, as the XKR file format is proprietary to Sing-Magic Karaoke and cannot be converted to any other media format.

We are not aware of any media editing software or (online) conversion tool capable converting XKR to MP4.

Simply put, it is impossible to convert XKR to MP4 directly.
Thus, there is no so-called xkr to mp4 converter or a free online xkr to mp4 converter to be found.