How to convert MP4 to MKV
Drop your MP4 files into the box at the top of the page, or click it to browse your files. The converter makes a copy of each one in MKV format. The conversion runs in your browser, so your videos never leave your device.
You can also choose a quality level, scale the video down to a lower resolution, and remove the audio.
Converting MP4 to MKV
MP4 is typically used for sharing and uploading video, because it plays almost everywhere, while MKV is used for downloaded films and screen recordings, where one file holds many tracks.
What changes when I convert MP4 to MKV?
The converter re-encodes the video, which costs a small amount of detail. Choose High quality for less loss and a larger file, or Small for the opposite.
MKV files are fine for storing video, but many phones, TVs and browsers cannot play them.
What are the limits when converting MP4 to MKV?
You can convert up to 10 videos a day for free, each up to 1 GB and 10 minutes long, at up to 1080p. Pro removes the daily limit and accepts videos up to 2 GB and 60 minutes long, with no resolution cap. See the plans.
Understanding MP4
MP4 is the most widely supported video format. It plays on phones, computers, TVs, browsers and social media sites, usually with H.264 video and AAC audio.
Understanding MKV
MKV is a flexible container that can hold almost any video and audio format, plus several audio tracks and subtitles. Many phones, TVs and browsers cannot play it.