MP4 to MKV converter
Turn MP4 into MKV
Send us the MP4 you already have and take away a MKV. Handled on our servers, deleted the moment the job ends.
or drag and drop files here
MP4 files • Max 100MB per file • Up to 10 files
Both formats, briefly
MP4IN
MP4 is the container to reach for when a file has to play somewhere you do not control: a phone, a smart TV, a browser tab, a client's laptop. Inside it you will usually find H.264 or H.265 video next to AAC audio, with room for subtitle and chapter tracks. Choose MP4 when broad compatibility matters more than anything else about the file.
MKVOUT
Matroska, seen as .mkv, is an open container with no practical limit on how many video, audio, subtitle and chapter tracks you stack inside one file. That makes it the usual home for a film kept with several language tracks and forced subtitles. Desktop players handle it well, while phones, TVs and browsers often refuse it.
Three steps, start to finish
Add your MP4
Drag it onto the page, or pull it in from your computer, Google Drive or Dropbox.
MKV is preselected
This page is already set to write MKV. Switch the target if you change your mind.
Take the MKV
Grab the result the moment the job clears. Your upload is wiped straight afterwards.