Your files stay on your device
Convert M4V to MKV
Turn MPEG-4 Video (iTunes) files into Matroska Video, right in your browser.
Drop your M4V files here
or click to browse from your device
Supports: M4V
MKV accepts nearly every kind of video, so most files copy over unchanged.
Everything runs in your browser. Nothing is uploaded.
Paste, drop, or type to begin. Everything stays on this device.