Convert MP4 to MKV
Convert your MP4 video files to MKV directly in your browser.
How to convert video in 3 steps
Choose a MP4 video file.
Click convert to MKV.
Download your MKV video.
Frequently Asked Questions
What is video conversion?
Video conversion changes a video file from one format to another, for example from MP4 to MKV, while keeping the video content.
Are my video files uploaded?
No. This tool processes video files directly in your browser. Your video files are never sent to a server.
Which video formats are supported?
This tool converts MP4 video files to MKV, all in your browser.
Is it really free and unlimited?
Yes, the tool is completely free and you can convert as many video files as you want, with no limits.
Does it work on mobile too?
Yes, it works on any modern device, including smartphones, tablets and desktop computers.
Which format will the result be in?
The converted file will always be in MKV format, ready to download and use.
About the video converter
Convert MP4 to MKV video online for free. Everything happens in your browser: your files are never uploaded to a server, and you need no downloads or sign-up to get started.