One file with everything a karaoke player needs — and nothing burned in
that a player might want to change.
Audio in roles and keys
instrumental, vocals, backing chorus — tagged tracks, optional pre-baked key changes
Lyrics as data, not pixels
soft ASS subtitles with karaoke timing — restyle colour, font and position at runtime
Self-contained and round-trippable
fonts, artwork and the original source files ride along in a standard Matroska container — a master alone can reconstruct its source
The karavox toolkit converts KaraFun (KFN), CD+Graphics and MIDI karaoke
(.kar) into masters, and exports portable MP4s with burned-in lyrics.
Binaries are self-contained — nothing to install.
No install, no command line — drop a file in and get an MP4 back,
right in your browser.
$ ls -l
total 768
-rw-rw-r-- 1 karavox karavox 786095 Dec 31 1788 'Robert Burns - Auld Lang Syne.kfn'
$ karavox mp4 'Robert Burns - Auld Lang Syne.kfn'
Robert Burns - Auld Lang Syne.kfn -> Robert Burns - Auld Lang Syne.mp4$ ls -l
total 784
-rw-rw-r-- 1 karavox karavox 786095 Dec 31 1788 'Robert Burns - Auld Lang Syne.kfn'
-rw-rw-r-- 1 karavox karavox 13157 Dec 31 2026'Robert Burns - Auld Lang Syne.mp4'
PS C:\Karaoke> ls
Directory: C:\KaraokeMode LastWriteTime Length Name
---- ------------- ------ -----a---- 31.12.1788 15:47 786095 Robert Burns - Auld Lang Syne.kfn
PS C:\Karaoke> .\karavox.exe mp4 'Robert Burns - Auld Lang Syne.kfn'
Robert Burns - Auld Lang Syne.kfn -> Robert Burns - Auld Lang Syne.mp4PS C:\Karaoke> ls
Directory: C:\KaraokeMode LastWriteTime Length Name
---- ------------- ------ -----a---- 31.12.1788 15:47 786095 Robert Burns - Auld Lang Syne.kfn
-a---- 31.12.2026 12:05 13157Robert Burns - Auld Lang Syne.mp4
One command: a ready-to-play MP4. The archival master tier is
karavox convert.